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该词基本定义中：“与某事物或某人相关的背景知识”倒是问题不大。
The basic definition is okay: "background information on something or someone."
youdao
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在某人受伤时，懂得急救知识能发挥重要的作用。
It is a knowledge of can make a real difference when someone is hurt.
youdao
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在某人受伤时，懂得急救知识能发挥重要的作用。
It is a knowledge of can make a real difference when someone is hurt.
youdao