短語詞組短語Closed Loop Ecological Cycle 閉合路的生態(tài)循環(huán)open -loop cycle 開路循環(huán)phase lock loop cycle slipping 鎖相環(huán)周期滑動phase -lock loop cycle slipping 鎖相環(huán)周期滑動cycle loop 循環(huán)回路major cycle loop 外部回路steam cycle power loop 蒸汽循環(huán)動力回路major cycle hysteresis loop 主磁滯回線 返回 loop cycle