in ballast

基本解释

The emptying method is the most common application in ballast water exchange, but it is still not perfect so far.
排空法是船舶最常用的壓載水更換方法，但目前這種方法還不盡完善。
The treatment system is designed to meet international standards that limit the number of living organisms in ballast water.
這套処理系統是按照國際標準設計的，可以限制壓艙水中的生物含量。
Conventional inductance type ballast will be washed out as its so many disadvantages, so electronic ballasts are taking the dominant status in ballast market gradually.
而傳統的電感式鎮流器因其諸多弊病將被逐漸淘汰，電子式鎮流器以其強大的優越性能正不斷佔據鎮流器市場的主導地位。

But it goes further than that: Ivanka is now often put in the role of the ballast in a ship periodically tossed by waves created by her increasingly embarrassing father.
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Recent history also suggests REITS are not exactly ballast in down markets.
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Everybody knows you need fixed-income securities as ballast in a portfolio.
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