单词	reverse curve
释义	reverse curve noun : an S-shaped curve (as in a railway line or a highway) made by joining two simple curves turning in opposite directions broadly : a stretch formed of two oppositely turning simple curves joined by a tangent Word History First Known Use 1821, in the meaning defined above
随便看	navelworts naves navesink highlands navet naveta navette navettes navews Navi Mumbai navicella navicert navicerts navicula navicular navicular bone naviculars naviculas navier navies naviest navigabilities navigability navigable navigable airspace navigableness

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