词汇	be pinned down on
释义	be pinned down on 明确表态
随便看	mean theorem mean theory mean thermal electromotive force versus copper mean thermal expansion coefficients mean thermal noise power mean thermal sensation mean thermal transmittance mean thermophysical properties parameters mean the world to sb mean thickness mean threshold of objection to echo mean threshold shear stress mean tidal level mean tidal range mean tide mean tide level mean tide range Mean Tilt Angle meantime mean time mean-time mean time at ship meantime auto-spectrometer meantime before failure mean time before failure