搜尋結果
ballast
- IPA[ˈbaləst]
美式
- heavy material, such as gravel, sand, iron, or lead, placed low in a vessel to improve its stability；heavy material carried in an airship or on a hot-air balloon to stabilize it, and jettisoned when greater altitude is required.
- give stability to (a ship) by putting a heavy substance in its bilge；form (the bed of a railroad line or road) with gravel or coarse stone
verb: ballast, 3rd person present: ballasts, gerund or present participle: ballasting, past tense: ballasted, past participle: ballasted
noun: ballast, plural noun: ballasts
- 釋義
- 片語
名詞
- 1. heavy material, such as gravel, sand, iron, or lead, placed low in a vessel to improve its stability the hull had insufficient ballast
- ▪ heavy material carried in an airship or on a hot-air balloon to stabilize it, and jettisoned when greater altitude is required.
- ▪ something that gives stability or substance the film is an entertaining comedy with some serious ideas thrown in for ballast
- 2. gravel or coarse stone used to form the bed of a railroad track or road a thick layer of railroad ballast
- ▪ a mixture of coarse and fine aggregate for making concrete.
- 3. a passive component used in an electric circuit to moderate changes in current ballasts are permanently wired into existing fixtures ballast resistors
動詞
- 1. give stability to (a ship) by putting a heavy substance in its bilge the vessel has been ballasted to give the necessary floating stability
- 2. form (the bed of a railroad line or road) with gravel or coarse stone the track was laid with rails and ballasted with earth
片語
