将一个操作数包装到number 、boolean 、string或者其他新增的类型构造器函数中。

Wrap one of the comparands in number , Boolean , string , or one of the new type-constructor functions.

youdao

如果需要创建与时间相关的数据类型的单个值，可以使用类型构造器函数并提供时间的字符串表示形式作为参数。

When you want to create an atomic value of one of the time-oriented data types, use a type-constructor function and provide the string representation as an argument.

youdao

通常，通过查找超类并确保存在匹配的超级构造函数，类型检查器确保这些超级构造函数调用会成功。

Normally, the type checker ensures that these super-constructor calls will succeed by looking up the superclass and making sure that a matching super-constructor exists.

youdao