每个标记有一个title属性，这个属性为命令定义一个可读的标题。

Each tag has a title attribute that defines a human readable title for the command.

youdao

用于访问集合对象本身的属性是只读的，而集合本身是可读写的。

The property to access the collection object itself is read-only, the collection itself is read-write.

youdao

用于访问集合对象本身的属性是只读的，而集合本身是可读写的。

The property to access the collection object itself is read-only, the collection itself is read-write.

youdao