Nicotine is a drug that gets one into the habit of smoking 尼古丁是一种使人吸烟上瘾的毒品。
Those who are in the habit of smoking treat it as a means of killing time 有吸烟习惯的人认为吸烟是一种消磨时间的方式。
Once you get into the habit of smoking ， you won ' t be able to give it up easily 你一旦抽烟抽上了瘾，就不可能轻易戒掉了。
It is said that there are about half of people in china are smoking . many young boys and girls have the habit of smoking , though they are middle school students 据说，中国有一半人在吸烟。许多男孩和女孩都有吸烟的习惯，尽管他们还是中学生。
They argue that if there are no cigarette advertisement on tv , no cigarettes available everywhere , and no adequate pocket money , teenagers are unlikely to take up the habit of smoking 他们认为：如果电视上没有香烟广告，香烟不是到处可买得到，孩子的零用钱不是很多的话，青少年不太可能染上吸烟的习惯。
