Another option demonstrated in Listing 6 is to define a countdown time that will run until the task is executed.

清单6中演示的另一个选项是定义一个倒计时时间，该时间将一直运行到执行任务为止。

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The code generated with this option is shown in Listing 11.

采用这一选项生成的代码如列表 11 中所示。

youdao

The code generated with this option is shown in Listing 8.

采用这一选项所生成的代码如列表8中所示。

youdao

They also have the option of not publicly listing any email address at all.

WSJ: Facebook's Email Change Riles Users