挡: 挡Ⅰ动词1.(拦住; 抵挡) keep off; ward off; block; resist 短语和例子挡道 block the road; get in the way; 挡风 shelter sth. from [keep out] the wind; 挡雨 keep off the rain; shelter one from the rain; 筑一道篱笆挡狗
回转: gyration; rotation; swing; turn; slew; [工业] slewing angulation; back swing; circumgyration; revolution; throw-over motion; turn round◇回转半径 [航海学] gyroradius; radius of gyration; 回转泵 drum pu
