main steam

基本解释

Web services are becoming a main steam technology for implementing services and providing interoperability between heterogeneous systems.
Web 服务正在逐步成为服务和提供异类系统之间的互操作性的主流技术。
The main steam, having been condensed in the condenser, is now in a liquid state at a very low pressure and approximately saturation temperature.
在凝汽器中冷却的主蒸汽现正处于压力非常低和大约饱和温度的液体状态。
mengang2008.blog.163.com
Finally, scheduling and precautions for verification tests of the calibration pressure of main steam safety valve under 83 %FP power level are given.
最后，给出在83 %FP以下的功率运行下进行主蒸汽安全阀定值校验试验的窗口安排与注意事项。

The main reason is that the economy has run out of steam.
ECONOMIST: Argentina
Even after radiation levels in the Fukushima main control room had spiked to 1, 000 times normal levels, radioactive steam had been vented into the environment, and hydrogen explosions had demolished large parts of two reactor buildings, sending radioactive debris a thousand feet into the air, NISA only raised the threat assessment to level 5 — the same as the far less catastrophic accident at Three Mile Island.
FORBES: Fukushima and Chernobyl, similar but different
The main reason I even own a controller for my PC is because there are dozens of Steam games I own that are either unplayable (Super Meat Boy, for example) or just not that fun (every other platformer, among plenty others) without one.
FORBES: Why Dark Souls On PC Will Be The Best Version Ever - Eventually

主蒸汽
Main steam temperature is as important as main steam pressure in power plant and its control requirement is very high.
主蒸汽温度也是火电厂中非常重要的参数，其控制要求很严格。
计算机科学技术
主汽温