ballast

US [ˈbæləst]
UK ['bæləst]
  • n.(船中保持平衡的)压舱物;(热气球的)镇重物
  • v.在…上装压舱物[沙囊];为(铁路等)铺道碴;使沉着
  • Web镇流器;安定器;压载
Plural Form:ballasts  Past Participle:ballasted  Present Participle:ballasting  
ballast
n.
1.
(船中保持平衡的)压舱物;(热气球的)镇重物heavy material placed in a ship or hot-air balloon to make it heavier and keep it steady
2.
(用作公路或铁路路基的)道砟a layer of stones that makes a strong base on which a road, railway/railroad, etc. can be built

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard