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  1. Oxford Dictionary

    ballast

    • IPA[ˈbaləst]

    英式

    • n.
      heavy material, such as gravel, sand, or iron, placed in the bilge of a ship to ensure its stability；a heavy substance carried in an airship or on a hot-air balloon to stabilize it and jettisoned when greater altitude is required
    • v.
      give stability to (a ship) by putting a heavy substance in its bilge；form (the bed of a railway line or the substratum of a 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
    • 相關詞
    • 片語

    名詞

    • 1. heavy material, such as gravel, sand, or iron, placed in the bilge of a ship to ensure its stability the hull had insufficient ballast
    • ▪ a heavy substance carried in an airship or on a hot-air balloon to stabilize it and jettisoned when greater altitude is required a forty kilo sandbag was used as ballast
    • ▪ something providing 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 railway track or the substratum of a road a thick layer of railway 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 people insufficiently ballasted with factual information
    • 2. form (the bed of a railway line or the substratum of a road) with gravel or coarse stone the track was laid with rails and ballasted with earth

    in ballast

    • ph.
      (of a ship) laden only with ballast

    Oxford American Dictionary

    in ballast

    • ph.
      (of a ship) laden only with ballast

    Oxford Dictionary

    片語

    • 更多解釋

    ballast

    • IPA[ˈbaləst]

    美式

    • n.
      heavy material, such as gravel, sand, iron, or lead, placed low in a vessel to improve its ... the hull had insufficient ballast
    • v.
      give stability to (a ship) by putting a heavy substance in its bilge: the vessel has been ballasted to give the necessary floating stability

    Oxford American Dictionary