常見(jiàn)例句雙語(yǔ)例句The Barrel life of Cannon is assessed by the rate of the muzzle velocity of pill to the standard velocity.通過(guò)用火砲外彈道測(cè)量的初速與標(biāo)準(zhǔn)初速的比率來(lái)評(píng)定火砲身琯壽命。 返回 standard muzzle velocity