Shoot correctly to avoid infection.
为防止感染正确注射。
Some people have been covering their nose and mouth with masks to try to avoid infection.
有些人用口罩遮住口鼻尽量避免被传染。
The child has just learned to tie his shoes, but he knows to protect the wound to avoid infection, but also a day to brush two teeth to protect the teeth.
这孩子刚学会系鞋带儿,但他都知道要保护伤口以免感染,同时还要一天刷两次牙来保护牙齿。
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