当收到的数据包数量少于发送的数量，数据包损失大于0时，ping失败。

A ping fails when the number of packets received is less than the number sent and packet loss is greater than 0 percent.

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最后一步是通知客户机已使用更新的订单值发送订单（发送的数量现在将包含实际发送的数量）。

The last step is to notify the client that the order shipped with the updated order values (the quantity shipped will now contain the amount that was actually shipped).

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在世界大多数地方，短信是最便宜、也是最受欢迎的手机通信方式。去年，即便是在美国，短信发送的数量也超过了直接通话。

Texting is the cheapest and most popular mode of cellphone communication in most of the world, and last year text messages topped voice calls even in the U.S..

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