System of couples
[化] 力偶系
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
n. 一对, 一双；夫妻；力偶（couple的复数）
🗣️ 情景例句
Why is that necessary?
为什么有此必要
But the market prices are changing frequently.
但是市场价格随时都在变化。
Today we have two new students. Their names are Lucy and Lily.
今天我们班来了两位新同学，他们的名字叫Lucy和Lily。