英语语法分析

A productive morning rewarded with a decent lunch, and then at about 3 p.m., there comes the irresistible sleepiness.

一个高效的早晨换来了一顿丰盛的午餐，然后在大约下午3点的时候，难以抗拒的睡意就来了。

This usually causes only minor discomfort, such as a skin rash, headache or sleepiness.

这通常只会引起轻微的不适，如皮疹、头痛或嗜睡。

Most experts in sleep behavior agree that there is virtually an epidemic of sleepiness in the nation.

大多数研究睡眠行为的专家都认为，在这个国家，嗜睡实际上是一种流行病。