Quadriad
n. 四个一组(或一套、一系列)
🗣️ 情景例句
you've made a very strong impression
你已经留下了非常深刻的印象
I will go to the drugstore.
我将去药房。
The conditions of society are such that skills have to be paid for in the same way that goods are paid for at a shop.
社会上的情况就是如此，技术是必须付钱去买的，就像在商店里要花钱买商品一样。