Gearcase
n. 齿轮箱, 变速箱壳体, (自行车)齿轮罩
🗣️ 情景例句
What's the difference between A and B?
A和B有什么不同？
Just tell me what you'd like me to do.
你要我做什么就请你吩咐吧。
Are they under the chair?
他们在椅子下面吗？