Differentials
n. 差异( differential的复数形式 ); 工资级差; （汽车）差动齿轮; 分速器
🗣️ 情景例句
It was our pleasure.
不胜荣幸。
Whom will you come back with?
你将和谁一起回来？
this little 'o' indicated that the train only stopped for mail.
这个标记表示列车是为装邮件而停车。