drawbridge
noun [ C ] uk/ˈdrɔː.brɪdʒ/ us/ˈdrɑː.brɪdʒ/
（旧时城堡等的）吊桥;（使大型船只能够通过的）开合桥
a bridge that can be raised or brought down in order to protect a castle from attack or to allow big boats to go under it
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