Did you know that?
know，英语单词，及物动词、不及物动词，作及物动词时意为“知道；认识；懂得”，作不及物动词时意为“了解；熟悉；确信”。
例句：
Do you know his address?
你知道他的地址吗？
The cause of the fire is not yet known.
火灾的原因尚不清楚。
All I know is that she used to work in a bank (= I have no other information about her) .
我只知道她曾在银行工作过。
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