bascule

bascule
[ˈbaskjuːl]
(亦作 bascule bridge)
noun
  1. a type of bridge with a section which can be raised and lowered using counterweights
    (其中一部分可以升降的)竖旋桥
    ■a movable section of road forming part of such a bridge
    竖旋桥的活动桁架
语源
  1. late 19th cent.: earlier denoting a lever apparatus of which one end is raised while the other is lowered, from French (earlier bacule), 'see-saw', from battre 'to bump' + cul 'buttocks'
英语宝典
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