[网络] 腐殖质

A: We made it! B: Great! There so much I want to play on. A: What do you want to do first? B: Lets go down the slide. A: Make sure youre careful. B: This is great! A: Howd you like the slide? B: The slide was so much fun. A: What would you like to do

发表于:2018-12-02 / 阅读(130) / 评论(0) 分类 英语情景对话-邻居

A: Were here! B: I want to go play! A: What do you want to do first? B: I want to go down the slide. A: Dont run, and be careful. B: I will. This is so much fun. A: Did you enjoy the slide? B: Yes. It was great. I went so fast. A: What else do you wa

发表于:2018-12-02 / 阅读(127) / 评论(0) 分类 英语情景对话-邻居

A: Here we are! B: Hurray! We finally made it to the park. A: What do you want to play on first? B: I want to go on the slide. A: All right, but be careful. B: Im having so much fun. A: Did you like the slide? B: I slid down it fast. A: Now what do y

发表于:2018-12-02 / 阅读(126) / 评论(0) 分类 英语情景对话-邻居

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(81) / 评论(0) 分类 探索与发现2012年

The Pyramids in Cairo are my favourite buildings in the whole world. I knew all about them when I was very young. They have always fascinated me. They really are one of the worlds wonders. People still dont know how they were built. I think they are

发表于:2018-12-26 / 阅读(91) / 评论(0) 分类 纯正英语一分钟

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(84) / 评论(0) 分类 探索与发现2012年

According to UNAIDS(联合国艾滋病规划署)estimates there were 38.6 million adults and 3.2 million children living with HIV at the end of 2002, and during the year 5 million new people became infected with the virus. Around half of all peop

发表于:2019-01-08 / 阅读(102) / 评论(0) 分类 阅读空间

Todd: OK, Simon, I was wondering you know, you have a newborn son and before you know it, he'll probably be 10 years old, 12 years old, and I wonder if his life will a lot different than it was for us when we were 10 or 12. Like for example, educatio

发表于:2019-01-20 / 阅读(154) / 评论(0) 分类 原版英语对话1000个

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(96) / 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(98) / 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(85) / 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(86) / 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(104) / 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(80) / 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(76) / 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(78) / 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(109) / 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(72) / 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(81) / 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(89) / 评论(0) 分类 探索与发现2012年
学英语单词
acquired resistance
anacharis
antoine laurent de jussieus
augustines
batwing antenna
be incapacitated from
be strapped for cash
belmontin
bird of Washington,the
block stone arch bridge
boom stay
broom-seed oil
butyl phenyl ether
capacity index
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cereviocidin
city plat
clay-likest
coleslaw
college-trained
come to me
comparative study approach
court of directors
crouchcage
cumulative grid rectification
current receipt
cysteinyl leukotriene
decimal carry
dichlorination
dopplergrams
dressed contact
elliptical semiflexible waveguide
epuivalent conductace
extrastimulation
Firmware.
foreign exchange agreement
fumbler
fundamental dimensions
gas leak rate
Gordonia axillaris
gowks
GoYas
have got the it by the throat
hump yard classification throat
hydrofluosilicic
hydrosme
i-tide
inlet time
internal model
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littlerest
Loxoconcha
luminous night cloud
market condition
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measure scale
miseducate
MPC-HC
mTOR
multiplatforms
nod to sb in greeting
non cumulative dividend
non-means-testeds
nonphysics
NSCCA
occlusal guide plate
opcode field
out to value
ox-bane
pearl tapioca
peroneus tertius
phantom ship
ploughs into
portable retort
preoperative
Rackheath
remittance check
revolving-armature type
scarecrowed
serial machine screw tap
sesquicentenary
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star dresser
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tg.
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undergo ... trial
uromodulin
Werdum
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Witzel operation
Yerkutayakha