词汇	tr ratio
释义	tr ratio n.变速器减速比
随便看	phase-only method phase-only modulated phase-only modulation phase-onlyoptical element phase-only pupil phase-only transform phase-open protection phase operator phase opposition phase optimal trajectory phase optimization phase optimization combination method phase option circuit phase orbit phase order phase-order arrangement phase-order impedance phase order indicator phase-order indicator phase ordering of loop optimizations phase order setup phase oscillation phase oscillation frequency phase-oscillation frequency phase oscillations