headroom
n [U] overhead space, esp above a vehicle; clearance 头上空间(尤指机动车的上方); 净空高度
There is not enough headroom for buses to go under this bridge. 这座桥梁下面的净空高度不够, 公共汽车不能通行.
🗣️ 情景例句
I'm his friend.
我是他的朋友。
Do not wash dirty linen in public.
家丑不可外扬。
If you are citing a train, it is always better to be comfortably early than even a fraction of a minted too late.