Quadriad
n. 四个一组(或一套、一系列)
🗣️ 情景例句
are important for the sales of your book.
对于你这本书的销售很重要。
A happy heart makes a blooming visage.
心花怒放，笑逐颜开。
They're said to be very good. What time does the performance start?
据说他们很棒。演出什么时候开始？