Also note that this class extends Expando, as this will be important later.

同时也要注意这个类继承了Expando，因为这个在后面很重要。

youdao

Also note that this class extends Expando, as this will be important later.

同时也要注意这个类继承了Expando，因为这个在后面很重要。

youdao