重點句型
1. Although surprised, the poachers had an advantage — there were more of them.
偷獵者雖然感到驚慌，但他們占有優勢——他們人多。

2. Often working at night, the poachers shoot whole herds of antelopes at a time, leaving only the babies, whose wool is not worth so much.
那些偷獵者常常是夜里出動，一次就捕殺掉整群的藏羚羊,只留下那些毛不那么值錢的幼崽。

3. Over the next ten years about 3,000 poachers were caught and 300 vehicles confiscated.
在接下來的10年里,大約有3,000名偷獵者被抓獲并有300輛汽車被沒收。

4. The WWF believes that our world has a future only if people learn to conserve nature and not waste energy.
世界自然基金保護組織相信，只有人們學會保護自然，不浪費能源，我們的世界才有未來。

句型探究
1. Although surprised, the poachers had an advantage — there were more of them.
偷獵者們雖然感到驚慌，但他們占有優勢——他們人多。
該句中Although 后省略了they were，在時間、條件、讓步狀語從句中，若從句的主語和主句的主語一致，且從句中含有be 動詞，這時可以把從句的主語和be動詞省略。
When (he was) walking in the street, he met his English teacher.
當在街上散步時， 他遇到了他的英語老師。
另外，在狀語從句中，若從句的主語是it, it又沒有實際意義，而且從句中又含有be動詞，這種情況下，也可省略從句的主語it和be動詞。
If (it is ) possible, I will go to Shanghai with you.
如果可能的話，我和你一起去上海。

2. Over the next ten years about 3,000 poachers were caught and 300 vehicles confiscated.
在接下來的十年中,大約有3000名偷獵者被抓獲和300輛汽車被沒收。
句中and連接的是兩個并列句，第二個分句省略了助動詞were。在并列句中，如果后面分句中有和前面分句相同的成分，就可以省掉，以免重復。
Some of us were clearing the windows and others (were) sweeping the floor.
我們中的一些人正在擦窗子，其他人打掃地板。