prevent us from being infected
...tried and tried his very best not to » 试了又试，他最好不要 prevent us from being infected » 防止被感染 We eat supper at night, here's something good to eat but very expensive, we eat are full.
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prevent us from being infected
防止我们被感染
以上为机器翻译结果，长、整句建议使用 人工翻译 。