词汇	畅颜
释义	畅颜 chàng yán猶開顏。臉上現出高興的樣子。
随便看	double-clocking double clog-leg cams double closed circuit circulation double closed loop double closed-loop double-closed loop Double-closed loop Double-closed-loop double closed loop control double closed-loop control double-closed-loop control double closed-loop controlling double closed-loop control system double closed-loop DC speed regulation double closed-loop decoupling double closed-loop irreversible governor Double closed loops double-closed loops control double closed loop speed-governing double closed-loop system Double closed ring double close end spanner double close loop double close-loop double close loop control