系鞋带儿
Tie your shoelaces
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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.
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