通常，一种优秀的实践就是不要在关系数据库中使用null(即没有值)列，因为当您试图读取这类列时，您将得到一个null值异常。

A general, good practice is not to allow null (that is, no value) columns in a relational database, because when you attempt to read such a column, you get a null value exception.

youdao

偏置电池弹针在最恶劣的的冲击条件下也能提供异常优秀的稳定性。

Biased battery contacts offer exceptional stability during the most severe of shock conditions.

youdao

他是我们的一个异常优秀的球员。

He was an exceptional player for us.

youdao