嵌入式sql语句将unit表中的主管姓名强制转换为xml类型(本例中为xml字符串)，然后将其提供给XQuery。

The embedded SQL statement casts the manager names in the unit table into an XML type (in this case into an XML string), and feeds them into the XQuery.

youdao

泛型相当有用，因为他们提供强制的编译时类型检查，要求更少的数据类型之间的显式转换，并减少装箱拆箱的操作和运行时类型检查。

Generics are useful because they provide stronger compile-time type checking, require fewer explicit conversions between data types, and reduce the need for boxing operations and run-time type checks.

youdao

当我们显式地提供强制类型转换时，警告信息就会被关闭。

When we provide the explicit cast, the warning message is turned off.

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