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词汇 ballast
释义 ballast
noun[ U ]
uk /ˈbæl.əst/ us /ˈbæl.əst/
heavy matter such as sand, stone, or water that is used at the bottom of a ship or a hot-air balloon to make it heavier, or the small stones on which railways and roads are made: (船的)压舱物;(气球的)镇重物;(用作路基的)道砟,石碴
The weed may have been accidentally imported in soil used as ship ballast.
A ship sailing with an empty hold will have filled its ballast tanks at its source port.
something that helps someone or something to succeed, especially by keeping them or it under control, or making them or it more serious:
He needed his platoon mates around him. They were his ballast.
The team is struggling because of a shortage of the ballast that senior players provide.
The boat had 35 tons of cement block ballast that caused it to ride lower in the water.
Zebra mussels are believed to have come to the United States in ballast water dumped by ships from Europe.
On discharging part of the ballast, the balloon ascended to the height of 200 yards.
The huge Christmas tree is held down by two tons of ballast.
They have failed to repair broken and cracked rails and failed to replace sleepers and stone ballast.
His deep voice added some needed ballast to this soprano-heavy score.
SMART Vocabulary: related words and phrases

Mass, area, weight & volume in general
A2
A3
A4
A5
area
density
expansivity
heft
high density
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

Examples of ballast


ballast
Another potential carrier would have been ships' ballast, especially from ships that were wrecked at the isthmus.
Furthermore, the fluorescent sources had conventional magnetic ballasts and therefore were subject to luminous flicker, whereas incandescent lamps do not flicker.
Suppose a surveyor is surveying a 2000 tonne cargo ship and discovers that ballast water is being stored in a fuel oil tank.
It also has floats and lead ballast units to maintain the stability of the structure.
The extent to which recently-founded labor-populist parties depended on the new unions for "organizational ballast," then became particularly clear.
Like ballast, the dead weight of your loss balances, restrains, holds you to measured meter.
In this, the theory goes, the condition and effectiveness of party organisations and underlying intellectual trends play a far bigger role than any historical ballast.
She also took in a few tons of graphite as ballast after having unloaded her main cargo.
However, since there was no wharf, jetty or landing beach, ballast from wrecked vessels would most likely have been dumped in seawater.
A device called a ballast performs this function.
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 academic ballast.
The north masonry facade of the causeway, capped by a parapet, was significantly more formal than the southern edge of the causeway, where the ballast feathered out.
No evidence of subfloor ballast was encountered.
Ballast water is stored in the fuel oil tank.
This constraint specifies that the mass of the yacht, before adding any ballast, must be less than or equal to the mass of the water that it displaces.
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.
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