Quadriad
n. 四个一组(或一套、一系列)
🗣️ 情景例句
Yes.
是的。
If you are interested, I will prepare a list of them.
如果您感兴趣的话，我可以列表让你参考。
After this he immediately lets himself in and begins barking again.
出去之后，它又马上把自己放进来，接着再开始叫。