headroom
noun [ U ] uk/ˈhed.ruːm/ /ˈhed.rʊm/ us/ˈhed.ruːm/ /ˈhed.rʊm/
(空间或桥梁的)净空高度
the amount of space below a roof or bridge
It's a small car but there's lots of headroom. 这是辆小型汽车,但它的内部空间很大。
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