Ballast
[ 'bæləst ]
辅助 Assistant
n. 压舱物，压载物;道渣，碎石;镇流器;<比喻>沉着;
vt. 给某物装上压舱物;给…铺道渣;使稳定;使沉着;
📝 例句
Arc lamps require a current-limiting ballast.
弧光灯需要一个限流镇流器。
The ballast may be thrown out to make the balloon go higher.
沙袋可以抛掉以使气球飞得更高。
bilge ballast pump
船底压载水泵
He furnished psychological ballast to a desperate President.
他给一位在绝望中挣扎的总统提供了心理镇定剂。
The rails of the two tracks are supported on wooden ties resting on a ballast.
两条线路的钢轨放置在有道碴承托的枕木上。
🌱 联想助记
【记】※ bal-ball球,last-最后的:最后一个球形压舱物
※ bal-ball球,last-最后的:装棉花的船太轻所以最后放上铅球作为压舱物
✅ 同义词
📖 牛津释义
ballast
n
1 [U] heavy material placed in a ship's hold to keep it steady 压舱物, 压载物（船中用以保持平稳的）.
2 [U] sand or other material carried in a balloon, that can be thrown out to make the balloon go higher 气球所装载的沙子或其他物质（可将其抛掉以使气球升得更高）.
3 [U] stones, etc used to make a foundation for a railway, road, etc （铺筑铁路、公路等之路基所用的）石块, 道渣.
4 [C] device used for stabilizing current in an electric circuit 镇流器.
5 (idm 习语) in ballast (of a ship) carrying only ballast （指船）仅装有压舱物的. ballast, v [Tn, Tn.pr]
~ sth (with sth) supply sth with ballast 给某物装上压载物.
🔁 扩展释义
*['bælәst]n. 压载物, 压舱物【经】 底货, 压舱货
🏥 医学释义
①镇流器 ②平衡器
📖 同为「GRE」词汇
查看全部GRE词汇 ›🗣️ 情景例句
That's reassuring.
真令人安心。
It's not my idea!
这主意不是我出的！
I'll start tomorrow.
我明天就开始干。