氰唑甲氧头孢菌素,先锋美他醇

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(85) / 评论(0) 分类 探索与发现2012年

Cheryl: So, Nick, you've worked as an environmental scientist in Australia. Nick: Yeah, I have. I worked in my hometown in Tasmania, and in Tasmania, there's many environmental issues, particularly involving logging of native forests there. Cheryl: O

发表于:2018-12-25 / 阅读(88) / 评论(0) 分类 原版英语对话1000个

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(87) / 评论(0) 分类 探索与发现2012年

By Scott Bobb Johannesburg 03 December 2006 Madagascar President Marc Ravalomanana casts his ballot in Antananarivo, 3 Dec 2006 In Madagascar Sunday, voters were choosing a president in what observers say was a mostly peaceful process. Many analysts

发表于:2019-01-11 / 阅读(147) / 评论(0) 分类 2006年VOA标准英语(十二月)

By Michael Bowman Washington 06 August 2006 Secretary of State Condoleezza Rice says the United States is ready to assist Cuba in a transition to democracy, but is not attempting to foment unrest on the island while President Fidel Castro is ill. --

发表于:2019-01-11 / 阅读(142) / 评论(0) 分类 2006年VOA标准英语(八月)

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(104) / 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(99) / 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(91) / 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(94) / 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(106) / 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(84) / 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(81) / 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(196) / 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(82) / 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(115) / 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(77) / 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(88) / 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(93) / 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(79) / 评论(0) 分类 探索与发现2012年

音乐咖啡厅:Seal - Les Mots 相关介绍:Seal 全名Seal Henry Samuel,于1963年2月19日出生在英国伦敦,他是一名混血儿,父母分别是自尼日利亚人和巴西人。自上世纪90年代以来,Seal一直都是英国最受欢

发表于:2019-02-05 / 阅读(213) / 评论(0) 分类 音乐咖啡厅
学英语单词
air surveillance
antenna device
antipod-
arylhydroxylamines
atomic beam spectroscopy
Bananal, I.do
base leakage
beacon magnetron
blochmann's corpuscle
catheterismus
certification of weight
charge per formula unit
conducteurs
contained radioactivity
conventionalizes
crack one's brain s
dalgish
degradation of plastics
direct-axis subtransient time constant
dooling
eglandular
electric model of reservoir
electric sounding machine
etifelmin
fatigue at high temperature
feed grinder
fineness moldulus
finitely valued function
first-rows
folding horst
four-pi counter
fowler-nordheim tunnelling
good for a laugh
GPUT
ground communication facilities
head hunter
Hefnerkerze
hiss off
Hydnocarpus Gaertn.
ictinuss
Impatiens tubulosa
index liquid
initiallings
inwalled
isomyarian
isopropylthiourea
jeffcotes
jump out of your skin
knock-offs
krafciks
lateral ligaments of metacarpophalangeal joints
leprotic fever
light polarization modulator
live pick-up
low-cost laptops
Luoping
magnetic neutral state
many-sorted predicate calculus
mixed species flock
morning woods
mullock
nanosecond pulse oscillator
noneroding
nonsymmetrical vibration
oiliness film
on the top of
optical orbital rendezvous apparatus
owliness
paleospecies
parabolic transformation
perikinetic aggregation
pocket watches
pulsed gasdynamic laser
RCEM
reaction of partial identity
rifle shot
rotary eccentric piston pump
Scheme programming language
sea barge carrier
seashore mallows
semiparadoxical
servo problem
Session Description Protocol
sign-check indicator
single boat purse seine
smart charger
smelling bottles
spinier
spurious jugular foramina
Steinsmyri
storage atmosphere
tassel-bush
teigh
Throw a monkey wrench into the works
time-sharing supervisor
trepassey b. (trepassy b.)
warm up time
wejacks
wind area
world cities
yellow turnip
zero loss circuit