船舶英语... ... crosschannel automobile ferries= 横越海峡车客渡轮 crosssectional area= 横剖面面积 crow's nest= 桅杆了望台 ...

duction of cross-sectional a... ... duction to half-frame a rea 缩摄一半 crosssectional area 横截面 paleozoic rea 古生代 ...