您要查找的是不是：
- hard self excitation 硬自激
- single phase commutator motor with self excitation 单相补偿串激电动机
- machine with inherent self excitation 内在自励磁电机
- Licht, L. and Fuller, D.D., “Self Excited Vibrations of an Air-Lubricated Thrust Bearing”, Trans. of the ASME, vol.80(2), pp.411-414,1958. 黄启华，虚拟口形气浮导轨之精密线性滑动平台特性分析，国立云林科技大学机械工程系硕士论文，2001。
- A lot of theoretical and laboratorial researches in self excited oscillating pulsed abrasive waterjet, and the comparison experiments with pre mixed abrasive waterjet was made . 对自激振荡脉冲磨料水射流进行了大量的理论和实验研究,并与前混合磨料水射流进行了对比实验。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- self excited static excitation system 自并励静止励磁系统
- Brushless ,winding insulation class H,self exciting ,and self regulating.Single bearing construction with drive from engine via a flexible disc coupling bolted directly to the engine flywheel. 采用单轴承，H级绝缘，自导通风，无刷旋转磁场型，具有自动激磁及自动稳压之功能并利用一可挠性的盘式耦合器而耦合于引擎的飞轮上。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- She was trying hard to disgorge a fish bone. 她拚命想把鱼刺吐出来。
- The emery is a hard metallic substance. 金刚砂是非常坚硬的金属物质。
- build up of self excited generator 自励发电机起建
