然后把该包放到网上，同时听一听看看在同一时刻是否有其它的设备也在发送信息，因为它会引起碰撞，并弄坏两个包。

Then it puts its packet on the wire and simultaneously listens to see if any other device sent something at the same time, which would cause a collision and garble both packets.

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如果您想看看在自己的系统中情况如何，那么应该对同一个邮箱中100封以上的邮件进行归档，并检查CSLD任务，查看持续时间字段。

If you want to see how your system compares, you should archive 100 or more mails from the same mailbox and check the CSLD job for the duration field.

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目前情况是，Android用户必须点击home键退出应用程序并返回到主屏幕才可以切换。 （也可以按住home键，看看在运行的应用程序，但这不是同一概念。）

Right now, Android users have to hit the home button to exit an app and return to the home screen (they can also hold down the home button to see key apps, but it’s the same idea).

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