nicotine

她最近改用电子烟来减少对尼古丁的依赖。

She recently switched to vaping to cut down on her ___nicotine intake.

嚼尼古丁口香糖帮助他减少了吸烟的欲望。

Chewing ___nicotine gum helped him reduce the urge to smoke.

电子烟也含有尼古丁，会让人上瘾。

E-cigarettes also contain ___nicotine, which can be addictive.