1、夏天过去了,秋天来了,天越来越短.2、我们做每件事都必须用脑.

the summer,autumn is coming,it is getting shorter 译：夏天：summer 秋天：autumn 短（此处）：shorter we did everything must be the head.译：任何事情（东西）：everything 脑子（头；脑袋）：head ...