Mistake is divided into unilateral mistake and mutual mistake. The man who makes unilateral mistake should not be succored by courts.

在这一理论中，错误被区分为双方性错误与单方性错误，其中单方性错误原则上不能得到救济。

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But ETNs, which generally are structured as borrowings by investment banks, are regulated like bonds, not like the mutual funds many investors seem to mistake them for.

WSJ: In New Funds, Old Flaws

It was a bad mistake made by both who have mutual attraction and many things in common.

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