fall into sth
(a) be able to be divided into sth 可分为
The lecture series falls naturally into three parts. 该系列讲座可自然分作三部分.
(b) develop or acquire sth 养成; 染上
fall into bad habits 养成坏习惯.
(c) be trapped by sth 落入圈套
We played a trick on them and they fell right into it. 我们设了个圈套, 他们就正好中计.