| 1. | Low and intermediate frequency instability models are taken up first .
首先处理低频和中频不稳定性的模型。 |
| 2. | The synchronized low-frequency rectifier is similar to a push-pull rectifier .
同步低频整流器与推挽整流器相似。 |
| 3. | At low frequencies , such as 10 per sec. , pulsation is sensed rather than vibration .
在低频率（譬如每秒十次）时，所感觉到的是脉冲而非振动。 |
| 4. | As the operating point crosses over the stability boundary, the chug amplitude disappears .
当工作点越过稳定性边界时，低频不稳定的振幅逐渐消失。 |
| 5. | Very little effort has been devoted to the experimental measurement of low frequency combustion response .
在低频燃烧响应的试验测定方面只做了很少的工作。 |
| 6. | The mask acts as a low frequency spatial filter whose effect is to enhance rendition of fine detail .
掩模就象一个低频空间滤波器，其效果是增强细节的重现。 |
| 7. | This firmly establishes the nature of the oscillations as low acoustic eigenmodes of the subphotospheric layers .
这就确凿地证实了振荡的本质是次光球层的低频声波本征模式。 |
| 8. | For low-frequency currents(up to about 15, 000 cycles per second)an iron core, called a magnetic circuit; is placed .
对于低频率电流（约15，000周秒以内），置有一个叫作磁路的铁心。 |
| 9. | Low or intermediate frequency combustion instability generally involves the interaction of several components of an engine system .
低频或中频燃烧不稳定性通常包含发动机系统中几个组件的相互作用。 |
| 10. | Study of low - frequency noise induced by marine propeller
船舶螺旋桨低频噪声研究 |
