come into leaf

1. 长叶

Trees come into leaf in spring.

树木在春天长叶子。

in leaf

1. 生有叶子

The trees will soon be in leaf.

树木很快就会长满叶子。

take a leaf out of sb.'s book

1. 学某人的样

You should take a leaf out of Tom's book.

你应该学学汤姆。

turn over a new leaf

1. 重新开始; 改过自新

He has been very lazy but he is going to turn over a new leaf and work hard.

他以前一直很懒, 但他将改过自新, 努力工作。