常見(jiàn)例句雙語(yǔ)例句When the gear rack is free from exogenic action, the upper master body and the lower master body are connected together by a spline;當(dāng)齒條不受外力作用時(shí)，上扳手體與下扳手體通過(guò)花鍵接合在一起；ip.com 返回 exogenic action