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
part of the building for younger people.
另一部分给年轻人用。
Easier said than done.
说时容易做时难。
He looked pale and his clothes were in a frightful state.
他面色苍白，衣服也搞得不成样子。