如何明智地使用牙膏。
Some people the easy way would be to use toothpaste smear, which is wrong.
有的人图省事,会用牙膏涂抹,这是错误的。
You don't really need to use toothpaste with your young child unless his diet includes lots of sugary foods - which you should avoid anyway.
其实你不一定要给孩子用牙膏,除非他的饮食中含有大量的甜食,这时你应该尽量控制和避免。
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