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而下部是凹的
释义
DEFINITIVE EXAMPLES 权威例句〔cyma reversa〕A cyma in which the upper section is convex and the lower section concave.波浪曲线装饰板：一种反曲线装饰板条，其上部是凸的，而下部是凹的美国传统
随便看
on a small scale
on a sticky wicket
on a string
on a string
on a sudden
on a sudden
on a sudden inspiration
on a tight rein
on a train
on a train
on a train
on a trial basis
on a trial basis
on a trial basis
on a vacation trip
on a visit
on a visit
on a visit
on a visit to
on a visit to
on a voluntary basis
on a voluntary basis
on a voluntary basis
on a walk
on a walk
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