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必修第三册 Unit 1 Nature in the balance(1)
1．When the explorers first set foot upon the continent of North America，the skies and lands
were alive with an astonishing(adj.令人惊讶的) variety of(各种各样的) wildlife.
2．In 1934，with the passage of the Migratory Bird Hunting Stamp Act(Act)，an increasingly
concerned nation took firm action(采取坚决行动) to stop the destruction of migratory(迁徙的)
waterfowl and the wetlands so vital to their survival.
3．Little wonder(不足为奇) the Federal Duck Stamp Program has been called one of the most
successful conservation programs ever initiated.
It is/was no wonder/surprise that...……不足为奇。
She is warmhearted，so it is no surprise/wonder that she always helps those who are in trouble.
4．Ask the tourists from around the world that flood into(涌入) Yellowstone National Park what
they most hope to see，and their answer is often the same: a grizzly bear.
5．Grizzly bears are re-occupying large areas of their former range(n.分布区域；领地)．
6．As grizzly bears expand(v.扩大) their range into places where they haven’t been seen in a
century or more，they’re increasingly being sighted by(被看到；被目击) humans.
7．Obviously(adv.显而易见)，if precautions(预防) aren’t taken，grizzlies can become
troublesome，sometimes killing farm animals or walking through yards in search of(寻找) food.
①in one’s search for寻找
②search sth/sb搜查某物/搜身
search for＝look for寻找
search...for...为找到……而搜查……
8．Indoor plants might look as if(“似乎；好像”，此处引导表语从句) they just sit
around(闲坐着) not doing much，but in many ways they are the unsung heroes of the home.
9．Many of these species(物种) are not ideally suited to(适合于) growing outside in the UK，
especially in the winter.
10．There are many benefits(n.好处) to growing plants indoors.
11．This concerns(vt.使担忧) Quick and other scientists because bees are essential to food
production.
12．The declining bee population can be caused(v.造成；引起) by several factors，including
parasites(寄生物) that harm(vt.损害；危害) or weaken the hives.
13．Habitat loss，chemicals，and climate change are also to blame(be to blame对……负有责任)．
14．After a three-year pilot period(三年的试点期)，the GPNP will be officially set up(成立)
next year.
