working substance

基本解释

The performances such as the content of working substance, interfacial tension. etc. were studied at the optimal experimental conditions.
同时在最佳实验条件下，对其有效物含量、界面张力等性能作了较为全面的研究。
As the basic safe wall of nuclear reactor, the reactor pressure vessel not only bears high temperature and high pressure, but also contains radioactive working substance.
反应堆压力容器作为反应堆的基本安全屏障，承受高温、高压且内部包含具有放射性的工作介质。
The concept of the lasing lifetime of working substance in the solid dye laser is promoted to liquid dye laser, and a twin laser beam testing method to measure the lasing lifetime is presented.
把固体染料激光器工作介质激射寿命的概念推广到液体染料激光器中，同时提出了一种针对液体激光染料激射寿命的双激光光路测试方法。

Scientists in the Washington area have been working with keratin, the main substance in poultry feathers.
If the very idea of soul that we're working with here under the dualist picture is the soul as an immaterial substance, it's not made of ordinary atomic matter.
如果关于我们正在讨论的,观点是建立在二元论的基础上,即灵魂是非物质实体,它并非由一般的原子物质组成
耶鲁公开课 - 死亡课程节选

Merck faces heavy competition in almost every area of brain research, especially from Pfizer, which has been working on substance P blockers for depression and on new, safer antianxiety drugs.
FORBES: Betting on the brain
This month, we pay tribute to all those working to prevent substance abuse in our communities, and we rededicate ourselves to building a safer, drug-free America.
WHITEHOUSE: The White House

the fluid, esp water, steam, or compressed air, that operates an engine, refrigerator, etc