and they, in turn, as they feed,create a bonanza for those on the ground below.他们在自己吃的同时也给地面生存的生物带来了福利

in turn依次；轮流；反之；反过来

She asked the same question of everyone in turn.

她依次向每一个人问同样的问题。

The students clean the classroom everyday in turn.

学生们每天轮流打扫教室。

They're over 60 centimetres long, already big enough to be a threat to the smaller inhabitants of the forest他们身长60多厘米，足以对森林里比他们小的居民构成威胁

enough to足以

Would you be good enough to keep silent?

请你保持安静好吗？

The merest noise is enough to wake him.

一丁点儿声音就足以把他吵醒。

only one in 100 of her youngsters is likely to reach adulthood.蛇宝宝长大成年的概率只有1%

likely to可能

Our firm is likely to reap a big profit this year.

今年我们公司很可能获得巨额利润。