Singletons
(singleton 的复数) n. 一个, 独生子, 独身
🗣️ 情景例句
They are indifferent to politics.
他们对政治漠不关心。
The contract will be sent to you by air mail for your signature.
合同会航邮给你们签字。
What a pity!
真遗憾！