常見(jiàn)例句The keel of the boat was made of steel.這船的龍骨是鋼制的。The keel of her sister ship will be laid by the time she discharges at Calcutta.等它在加爾各答卸貨的時(shí)候，它的姊妹船的龍骨就會(huì)鋪好啦。 返回 bilge keel