bilge keel

常見例句

• 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。
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