pill
药片
我们都知道“药”是medicine，但是“药片”更多的是用pill表示。
Lily has a heart disease and she has to take pills every day.
莉莉有心脏病，必须每天吃药。
对话
A:How many pills do I have to take every day?
我每天要吃几片药?
B:Two is enough.
两片就够了。
“安眠药”用英语表示是sleeping pill。
另外，“药片”还可以表示为tablet /ˈtæblət/
Take one tablet every four hours.
每隔四小时服一片。
depression /dɪˈpreʃn/
抑郁症
Nancy suffered from depression after losing her job.
自从失业之后，南希就得了忧郁症。
对话
A:Do you know what's wrong with Mary?
你知道玛丽怎么了吗?
B:I have heard that she had suffered from depression.
我听说她得了抑郁症。
prevent colds
预防感冒
You should eat more fruit to prevent colds.
要想预防感冒，就应该多吃点水果。
对话
A:How can I prevent colds?
我该怎样预防感冒呢?
B:I think doing sports is the best way.
我认为做运动是最好的方法。
painkiller /ˈpeɪnkɪlə(r)/
止痛药
“痛”用英语可以表示为pain，而“止痛药”就是能“杀死疼痛的事物”，所以可以表示为painkiller。
I have a headache. Can you prescribe some painkillers for me? /prɪˈskraɪb/
我头疼。您能给我开点止痛药吗?
对话
A:What do you think of this painkiller?
你觉得这种止痛药怎么样?
B:It usually acts fast.
它通常见效很快。
“止痛药”除了用painkiller来表示外，
还可以表示为pain reliever。
treat
治疗
Bob is being treated in the hospital.
鲍勃正在医院接受治疗。
对话
A:Are you alright now?
你的病好了吗?
B:Yes, thanks to the doctor who treated me well, I am cured now.
好了，多亏医生悉心的治疗，我现在痊愈了。
“治疗”还可以用短语give treatment来表示。
另外，与“治疗”相关的“治愈”用英语表示是cure。
