Headache can be very painful and can last for a long time（头疼会很疼，而且会持续很长时间）Last for 持续
If you have a headache your head hurts（如果你头痛，你的头就很疼）
A sprained ankle can be so painful that you can't walk（扭伤脚踝会非常痛，你不能走路）
Someone with a sprained ankle may need to use crutches to walk（一些人扭伤脚踝需要用拐杖去走路）
If you have a sore throat it maybe painful to swallow（如果你有喉咙疼，可能痛苦屈吞咽）
A sore throat can be caused by viruses or bacteria（喉咙痛可能是病毒或细菌引起的）
A burn is an injury to the skin caused by fire or heat（烧伤是由火或热引起的皮肤伤害）
If you get too close to a fire you will be burned（如果你离火太近，你将被烧伤）
An earache is a sharp dull or burning pain in the ear（耳痛是在耳朵里剧烈的钝痛或灼痛）
Common causes of an earache include an infection，a charging air pressure or water in the ear（一般导致耳痛的原因包括感染，空气的压力，或耳朵进水）
When you have a sore throat ，the back of your throat is often read and infected（当你有喉咙痛，你的喉咙经常阅读或感染）
Earaches occur more often among small children than adults （耳痛比成年人更容易发生耳痛）
A headache can be caused by an injury to the head（头痛是由头部受伤引起的）
Be caused by 由…引起
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