| 单词 | ballast |
| 释义 | noun | verb ballastballast1 /ˈbæləst/ noun [uncountable] 1heavy material that is carried by a ship to make it more steady in the water2material such as sand that is carried in a balloon and can be thrown out to make it rise3broken stones that are used as a surface under a road, railroad lines, etc. noun | verb ballastballast2 verb [transitive] to fill or supply something with ballast |
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