英语词汇ballast怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	ballast
释义	bal.last 5bAl7Est n [U] heavy matter such as sand or stone that is used at the bottom of a ship or a BALLOON to make it heavier, or the small stones on which railways and roads are made 压舱物, 镇重物;石碴, 道碴
随便看	apogee apolitical apologetic apologetically apologia apologies apologist apologize apology apology apoplectic apoplexy apostasy apostate apostle apostolic apostrophe apothecary apotheosis appal appalling appallingly apparatus apparatus apparel

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