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单词 ballast
释义
ballast
noun[U]
uk
/ˈbæl.əst/us
/ˈbæl.əst/
heavymattersuch assand,stone, orwaterthat is used at thebottomof ashipor ahot-airballoonto make itheavier, or thesmallstoneson whichrailwaysandroadsare made:
Theweedmay have beenaccidentallyimportedinsoilused asshipballast.
Ashipsailingwith anemptyholdwill havefilleditsballasttanksatitssourceport.
something thathelpssomeone or something tosucceed,especiallybykeepingthem or it undercontrol, or making them or it moreserious:
Heneededhisplatoonmatesaround him. They were his ballast.
Theteamisstrugglingbecause of ashortageof the ballast thatseniorplayersprovide.
More examples
  • Theboathad 35tonsofcementblockballast thatcausedit toridelowerin thewater.
  • Zebramusselsarebelievedto have come to theUnitedStatesin ballastwaterdumpedbyshipsfromEurope.
  • Ondischargingpartof the ballast, theballoonascendedto theheightof 200yards.
  • ThehugeChristmastreeishelddown by twotonsof ballast.
  • They havefailedtorepairbrokenandcrackedrailsandfailedtoreplacesleepersandstoneballast.
  • Hisdeepvoiceaddedsomeneededballast to this soprano-heavyscore.
SMART Vocabulary: related words and phrases
Mass, area, weight & volume in general
  • A2
  • A3
  • A4
  • A5
  • area
  • dead weight
  • density
  • displacement
  • heft
  • legal
  • letter
  • mass
  • non-dimensional
  • specific gravity
  • sq.
  • square
  • tare
  • volume
  • volumetric
  • weight

You can also find related words, phrases, and synonyms in the topics:

Railways & railway lines
Parts of ships & boats
Limiting and restricting

Idiom

in ballast
(Definition ofballastfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)
ballast
noun[U]
uk
/ˈbæl.əst/us
/ˈbæl.əst/
heavymattersuch assandorstonethat is used at thebottomof ashipor a hot-airballoonto make itheavier, or thesmallstoneson whichrailwaysandroadsare made
（船的）压舱物；（气球的）镇重物；（用作路基的）道砟，石碴

Examplesofballast

ballast
Another potential carrier would have been ships'ballast, especially from ships that were wrecked at the isthmus.
From theCambridge English Corpus
Furthermore, the fluorescent sources had conventional magnetic ballasts and therefore were subject to luminous flicker, whereas incandescent lamps do not flicker.
From theCambridge English Corpus
Suppose a surveyor is surveying a 2000 tonne cargo ship and discovers thatballastwater is being stored in a fuel oil tank.
From theCambridge English Corpus
It also has floats and leadballastunits to maintain the stability of the structure.
From theCambridge English Corpus
The extent to which recently-founded labor-populist parties depended on the new unions for "organizationalballast," then became particularly clear.
From theCambridge English Corpus
Likeballast, the dead weight of your loss balances, restrains, holds you to measured meter.
From theCambridge English Corpus
In this, the theory goes, the condition and effectiveness of party organisations and underlying intellectual trends play a far bigger role than any historicalballast.
From theCambridge English Corpus
She also took in a few tons of graphite asballastafter having unloaded her main cargo.
From theCambridge English Corpus
However, since there was no wharf, jetty or landing beach,ballastfrom wrecked vessels would most likely have been dumped in seawater.
From theCambridge English Corpus
A device called aballastperforms this function.
From theCambridge English Corpus
The way the authors deal with difficult material is not to break it up so that readers can make sense of it, but to weigh it down with academicballast.
From theCambridge English Corpus
The north masonry facade of the causeway, capped by a parapet, was significantly more formal than the southern edge of the causeway, where theballastfeathered out.
From theCambridge English Corpus
No evidence of subfloorballastwas encountered.
From theCambridge English Corpus
Ballastwater is stored in the fuel oil tank.
From theCambridge English Corpus
This constraint specifies that the mass of the yacht, before adding anyballast, must be less than or equal to the mass of the water that it displaces.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/ballast##
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更新时间：2024/12/28 2:46:25