Metatheorem
[计] 元定理
🗣️ 情景例句
They'll be at your door within a few minutes.
他们会尽快送到你的门口。
I have two tickets for a great movie. Why don't you come with me?
我有两张大片的电影票，你要同我一起去看吗？
One can tell the difference almost at a glance, for a spider always has eight legs and insect never more than six.
人们几乎一眼就能看出二者的差异，因为蜘蛛都是8条腿，而昆虫的腿从不超过6条。