What does it mean by 'the mean'?

可平均数又是什么呢？

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What does it mean by the term "tidal range" ?

“潮差”这个术语什么意思？

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For example, what does it mean that he "was seen by angels"?

例如，他“被天使看见”这句是甚么意思？

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For example, what does it mean that he "was seen by angels"?

例如，他“被天使看见”这句是甚么意思？

youdao