妙语佳句:

原文:It's the tree's natural defence against attack.

defence against:防御, 保卫

例句:This wall is a defence against the sea.

这堵墙是抵挡海水的。

原文:some of the world's richest forests were torn up and burned.

torn up:(torn,动词tear的过去分词)撕毁

例句:An elephant can tear up a tree by the roots.

大象能把一棵树连根拔起来。

原文:Just one severe frost will kill off these delicate rubber trees.

kill off:杀光, 消灭

例句:Frost can kill off a young plant.

严寒会摧毁幼苗。

原文:So Yunnan's terrain puts a limit on how far the plantations can spread,halting at least their northwards advance.

put a limit:进行限制

例句:He put a limit on the amount we could spend.

他规定了我们开销的数额。

考考你:

这是树木面对攻击时的自我保护。

液体将被熬制成为一种非常重要的材料。

北京当局把目光转向了橡胶树唯一能够快速成材的地方。

上期答案:

They are confined to these forest mountains,

If it survives infancy,then it has a promising future.