常見例句雙語例句A first index calculating module calculates a first index by which a bone density is evaluated using the speed of sound of the surface wave in the transverse direction.第一指標(biāo)計算器使用橫方曏的表麪波音速， 來計算評價骨密度的第一指標(biāo)。ip.com 返回 transverse sound wave