Quadrupleness
四重性
🗣️ 情景例句
One apple. Two apples. Three apples. Four apples.
一个苹果。两个苹果。三个苹果。四个苹果。
I'm busy!
我在忙啦！
In this way, he has begun his own private 'telephone' service.
就这样，他开始自己的私人“电话”业务。