Quadriad
n. 四个一组(或一套、一系列)
🗣️ 情景例句
Smoking is bad for your health.
吸烟对你的健康有害。
Sleep well.
祝您睡好。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。