Using this model, the paper studies the affection of the change of the bore diameter in each feature section to the initial velocity of projectile, and the relationship between the initial velocity of projectile and the total change of the bore diameter.是什么意思_Using this model, the paper studies the affection of the change of the bore diameter in each feature section to the initial velocity of projectile, and the relationship between the initial velocity of projectile and the total change of the bore diameter.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句