Since it is implemented as an anonymous function within another function, one could do some preliminary checks and calculations before creating the iterator.
由于它是在另外一个函数当中实现了一个匿名函数，人们就能够做一些前置检查和在迭代器创建之后进行计算。
A: Sure. Let me check the balance. (Mr. Wang picks up a file and checks the Preliminary Sale and Purchase Agreement.) the balance is forty-three thousand HongKong dollars.
好的，让我先查看差额。(王先生拿出文件，查看临时买卖合约。)差额是四万三千港币。
The cape quake whose preliminary magnitude is measured at 6.6 is reported to have rattled houses and to have caused the partial closure of a nuclear power station for safety checks.
这场地震最初的震级为6.6，造成房屋多处房屋倒塌。为了进行安全检查，核电站部分关闭。
The cape quake whose preliminary magnitude is measured at 6.6 is reported to have rattled houses and to have caused the partial closure of a nuclear power station for safety checks.
这场地震最初的震级为6.6，造成房屋多处房屋倒塌。为了进行安全检查，核电站部分关闭。
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