This enables the system to send requests about a number of packages all at once and check the response at a later time one by one.

这使得系统可以一次发送关于多个包的请求，并且在以后逐个检查响应。

youdao

This enables the system to send requests about a number of packages all at once and check the response at a later time one by one.

这使得系统可以一次发送关于多个包的请求，并且在以后逐个检查响应。

youdao