左旋咪唑

A hundred years ago, there are one and a half billion people on earth. Now, over six billion crowd our fragile planet. But even so, there are still places barely touched by humanity. This series will take you to the last wildernesses and show you the

发表于:2018-12-03 / 阅读(212) / 评论(0) 分类 探索与发现2012年

In this Business English Podcast, were going to look at delivering an elevator pitch. A sales pitch is a presentation designed to introduce a product or service in order to convince people to buy it. An elevator pitch is a very short presentation des

发表于:2018-12-05 / 阅读(406) / 评论(0) 分类 商务英语演讲课

The penguins stay when all other creatures have fled because each guards a treasurea single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. There is no food and no water for them. And they will not see the sun

发表于:2018-12-27 / 阅读(216) / 评论(0) 分类 探索与发现2012年

Sorry,thereisnottexttemporarily,Pleasehelptingroomtolookforit! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thankyou! 棒棒学英语 爱探险的朵拉 BBC儿童动画-小猪威

发表于:2019-01-01 / 阅读(299) / 评论(0) 分类 美国学乐经典动画100(MP3下载)

They are constantly on the move. New-born calves have to be up and running the day they are born. But the vast herds do not travel alone. Wolves. Packs of them, eight to ten strong, shadow the migration. And they are hungry. Its the newly born calves

发表于:2019-01-23 / 阅读(243) / 评论(0) 分类 探索与发现2012年

But they are hungry and eager to reach their mother whos delayed feeding them on this special day. Now she lures them with the promise of milk, the only food the cubs have known since they were born, deaf and blind beneath the snow some two months ag

发表于:2019-01-23 / 阅读(253) / 评论(0) 分类 探索与发现2012年

Day 10. And the mother has let her cubs a mile from the den. Its time to put them to the test. Theyve grown enormously in confidence, but they dont have their mothers sense of urgency. At last it seems that they are ready for their journey. And they

发表于:2019-01-23 / 阅读(233) / 评论(0) 分类 探索与发现2012年

Midsummer on the tundra and the sun does not set. At these altitudes, the suns rays are glancing and not enough of their energy reaches the ground to enable trees to grow. Youll need to travel five hundred miles south from here before that is possibl

发表于:2019-01-23 / 阅读(221) / 评论(0) 分类 探索与发现2012年

As we travel south, so the suns influence grows stronger. And at 50 degrees of latitude, a radical transformation begins. Summers here are long enough for broadleaf trees to replace conifers. Broadleaves are easier to eat and digest, so now animals c

发表于:2019-01-23 / 阅读(246) / 评论(0) 分类 探索与发现2012年

The advance of the seasons brings constant change. As the suns influence diminishes in the north, so the deciduous forests of America begin to shut down, losing their leaves in preparation for the dark, cold months ahead. One season hands over to ano

发表于:2019-01-23 / 阅读(229) / 评论(0) 分类 探索与发现2012年

The character of the forest changes as we descend, becoming ever darker and damper, favoring different kinds of animals and plants. Less than two percent of the sunlight reaches the floor. But even here there is extraordinary variety. In the Great Is

发表于:2019-01-23 / 阅读(208) / 评论(0) 分类 探索与发现2012年

The strike of a great white shark lasts a mere second. Slowing it down forty times reveals the technique and immense strength of this massive predator. If surprise fails, there will be a chase. The shark is faster on a straight course, but it cant tu

发表于:2019-01-23 / 阅读(301) / 评论(0) 分类 探索与发现2012年

The sun beating down on tropical waters powers the weather systems of the globe. Moisture evaporates from the warming ocean and rises to create great storms. The winds generated out at sea sweep inland across the continents. As they travel across the

发表于:2019-01-23 / 阅读(239) / 评论(0) 分类 探索与发现2012年

Deer are frequent casulties of the harsh winter. And these leopards are not above scavenging from a corpse. African leopards could never survive here. But the Russian cats have thick fur to shied them from the cold. There are only 40 Amur leopards le

发表于:2019-01-23 / 阅读(268) / 评论(0) 分类 探索与发现2012年

Their secret is teamwork. Impala are their favourite prey. They start to hunt and the pack splits up. An aerial viewpoint gives a new insight into their strategy. As the dogs approach their prey, they peel off to take up separate positions around the

发表于:2019-01-23 / 阅读(243) / 评论(0) 分类 探索与发现2012年

The dogs know their prey must come out or drown. Now its a waiting game. The rest of the pack are calling. Theyve made a kill in the forest and this is an invitation to join in the meal. The impala is in luck. A pack this size kills once a day and ev

发表于:2019-01-23 / 阅读(246) / 评论(0) 分类 探索与发现2012年

All across southern Africa, all animals are journeying for the same reason. Buffalo join the great track. Nowhere else on Earth are so many animals on the move for the same urgent purpose. They are all heading for the swamps of the Okavango, a vast i

发表于:2019-01-23 / 阅读(255) / 评论(0) 分类 探索与发现2012年

At the peak of the dry season in the Kalahari, water arrives in the Okavango. It fell as rain a thousand miles away in the highlands of Angola and has taken nearly five months to reach here. The water drives out insects from the parched ground which

发表于:2019-01-23 / 阅读(228) / 评论(0) 分类 探索与发现2012年

英文歌词: workin' like a dog for the boss man (whoa) workin' for the company (whoa-yeah) bettin' on the dice I'm tossin' (whoa) I'm gonna have a fantasy (whoa-yeah) where am I gonna look? they tell me that love is blind I really need a girl like an

发表于:2019-01-27 / 阅读(262) / 评论(0) 分类 英文摇滚歌曲

Benjamin: That was really a nightmare! Shirley: Honey, what's up? Benjamin: I was stuck between 15th and 16th floors in the elevator. Shirley: Oh, really? I know that telephone signal must have been shielded in the elevator shaft, so what did you do

发表于:2019-03-16 / 阅读(407) / 评论(0) 分类 英语大赢家下册
学英语单词
.lc
a smash hit
akinola
Altenfelden
aluminothermic reduction
arteriovenous oxygen difference
Barracuda Ridge
Battery Freshness Seal
begab
Burujon
cam shaped piston
cash contract
cementating furnace
circellus venosus hypoglossi
cold junction compensator
concrete track bed
condenser transmitter amplifier
converbal
coup de fouet
Cromford
cross-tie
diffusion scattering
double check system
double curved line
dropping out
electromagnetohydrodynamics
Erigeron pseudotenuicaulis
expanded data out
fabricated metal industry
feeder cable network
flagellated bodies
floating fish reef
Fore-brace
frictional press
full pressure waterpipe branching
Gaeta, G.di
gazunga
generative cell
good-size
Greeker
Grez-en-Bouère
halocline layer
has no effect up on
hirudinized
house-maids
increasing irrigation efficiency
interaction cross-section
iterative decision loop
liquid oxygen/kerosene rocket engine
local junction circuit
Luuk
make a pause on the brink of a precipice
marching musics
mastermindings
matroclinal (kerney 1881) inheritance
meteorologica
monoamnionic twin pregnancy
moselle
mounted rotary cultivator
multichannel environment
multilinear operator
multiscale
naval research laboratories
noh
nosegrind
Nothweiler
opticroms
otorrhoea
palmitoyltransferases
peacebreaker
peane
prize cases
programming depth
pulse peak width
pyrenocarpous
ramshackle
reast
reflectible
reitzel
relative humidity of moist air
ring wear
sayve
secondary steelmaking process
snaggle-tooths
spectrum degeneration
sphae raesthesia
square head screw
starting preheater boiler
STDWT
straight plowing
superadditional specialization
supersolids
switchgear & MCC module
syndrome of upper excess and lower deficiency
teleconversations
three-point perspective
Tistrup
transfer-oriented firms
unbranslable
uninstrumented fuel assembly
warning net
Wirtz, William Willard