但是如果你本人想开张兑现支票，就不可打叉线。

When you send a cheque by post be careful to cross it, but if you wish to cash a cheque yourself, you must leave it open.

youdao

这是一本支票簿，你邮寄支票时，要在支票上打叉线。

Here's the cheque book. When you send a cheque by post, just cross it.

youdao

有一种也许可行的方法，就是在其后放置一线网，在叉线处引入磁场。

One way this might be done is to place a grid of wires behind them and induce a magnetic field where the wires cross.

youdao