ballast
n. 压载物, 压舱物 [经] 底货, 压舱货
发音
词形变化
教材释义与例句
压舱物， 压载物；道渣，碎石
给…装压舱物；给…铺道渣
释义与例句
-
1.
Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability.
压载
不可数 航海 交通 -
2.
Anything that steadies emotion or the mind.
比喻 不可数 -
3.
Coarse gravel or similar material laid to form a bed for roads or railroads, or in making concrete; track ballast.
道砟
道碴
不可数 -
4.
A material, such as aggregate or precast concrete pavers, which employs its mass and the force of gravity to hold single-ply roof membranes in place.
不可数 商务 建筑 工程 -
5.
A material, such as aggregate or precast concrete pavers, which employs its mass and the force of gravity to hold single-ply roof membranes in place.
Loose stone or big gravel used to hold rails and tracks in place.
不可数 商务 建筑 工程 交通 -
6.
device used for stabilizing current in an electric circuit (e.g. in a tube lamp supply circuit)
可数 商务 工程 物理 电子 不可数 -
7.
That which gives, or helps to maintain, uprightness, steadiness, and security.
比喻 不可数
-
1.
To stabilize or load a ship with ballast.
及物 -
2.
To lay ballast on the bed of a railroad track.
及物 -
3.
To weigh down with a ballast.
及物
词汇关系
相关短语
词源
From Middle English bar (“bare”) + last (“load”).
来源：wiktionary