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
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
Have you eaten any dessert?
你吃甜点吗？
The wagging dance meant that food was far away.
摇摆舞表示食物在远处。