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ballast是什么意思及用法

沪江词库精选ballast是什么意思、英语单词推荐、用法及解释、中英文句子翻译、英语短语
英音 ['bæləst] ;
美音 ['bæləst] ;
不可数名词:
1.(船中保持平衡的)压舱物;(热气球的)镇重物
2.(用作公路或铁路路基的)道砟
英语解释
  • make steady with a ballast
  • coarse gravel laid to form a bed for streets and railroads
  • a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
  • an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
  • an electrical device for starting and regulating fluorescent and discharge lamps
  • any heavy material used to stabilize a ship or airship
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