向机外排泄overboard: adv. 向船外;(自船上)到水中。 fall over ...drain: vt. 1.排去(水等液体),排泄,放干 (away; ...drain overboard assembly: 机外放油组件overboard drain connector: 机外油接头overboard steam drain: 蒸汽排出; 蒸汽向外排出下载手机词典可随时随地查词查翻译