Quadriad
n. 四个一组(或一套、一系列)
🗣️ 情景例句
Okay, hold on a second. I'll talk to him.
好的，我跟他说，你等一下。
If the old dog barks, he gives counsel.
如果老狗叫，他是给忠告。
There's no need for that. We'll have dinner another time.
不必为那件事惭愧。我们改个时间再共进晚餐吧。