But you can write it down It's a concept that links itself to a literary or verbal written expression.

但是你们可以将负二的平方用笔写下来,那是种概念，能将其自身,与文学或文字书面的表达连接起来。

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Suppose they have a written contract, or even an unwritten contract, what enforces the contract for colluding firms or crooks in jail?

假如他们签了一份书面协议,或干脆口头的,他们怎么强制履行呢

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That is before there is any written evidence from the period in which you are interested.

那是一个你所感兴趣,而无任何书面记录的时代

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