英语语法分析

Nicotine produces a feeling of well-being in the smoker.

尼古丁能让吸烟者产生一种愉悦的感觉。

《柯林斯英汉双解大词典》

Unless you're a smoker or you're thinking of becoming a smoker, and then maybe you should worry.

除非你是一个吸烟者或者你正考虑成为一个吸烟者，那么你可能就需要担心了。

Moreover, make sure that a smoker washes his hands and face, and changes his clothes before picking up the baby.

此外，确保吸烟者在接孩子前洗手、洗脸、换衣服。