对于长期存在的连接，或使用连接池技术时，这个行为可能不尽人意，这种情形应该使用“Required”目标重要性。

This behavior may be undesirable for long-lived connections, or in situations where connection pooling is used, which may motivate use of the "Required" target significance.

youdao

该系统可能使用智能身份证或连接到特定计算机的数字证书，并在一系列在线服务中认证用户。

The system might use a smart identity card, or a digital credential linked to a specific computer and would authenticate users at a range of online services.

youdao

乘客将能够在空中使用 5G 网络连接互联网或订购食品和饮料。

Passengers will be able to use 5G networks in the air to connect to the Internet or place orders for food and drinks.

youdao

So that is a flag that tells the compiler that I want to use or link into my own program code that someone else wrote that lives somewhere else on the system whose moniker is CS50.

所以那是一个标记，用来告诉编译器我想使用,或连接我自己的程序代码到一个叫做CS50的系统中的程序,可能其他人在那个系统写了这些程序。

哈佛公开课 - 计算机科学课程节选