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- They emit high frequency pulses of sound through their mouth or nose which bounce off surfaces and objects around them. 它们通过嘴或鼻子发出高频脉冲声，这些脉冲声碰到周围的表面或物体就会反射回来。
- Liu Zheng, Zhang Shouhong.Estimation of target motion parameter in a stepped frequency pulses radar [J].Acta Electronica Sinica, 2000, 28 (5): 43-45. [5]刘峥;张守宏.;步进频率雷达目标的运动参数估计[J]
- These models use a simulated input transducer that vibrates purely sinusoidally with a fixed frequency. 这些模型采用一个模拟输入探头，以完全正弦波的形式按固定频率振动。
- The HV9931 is a fixed frequency PWM controller designed to drive proprietary single-stage single-switch no-isolated topology,cascading an input power factor correction(PFC)buck-boost stage and an output buck converter power stage. HVV9931是一个设计用于驱动专利单级单开关非隔离拓扑,级联一个输入PFC降压-升压级和输出降压变换器级的固定频率PWM控制器。
- If you touch the string gently, it vibrates at a fixed rate ( in other words, at a fixed frequency), but the distance between the top and bottom of the area in which it vibrates is small. 如果你轻轻地拨动琴弦， 琴按照固定的频率来震动（换言之，其频率是固定的），但它从顶部到底部的震动区域的范围是小的。
- The tables are firmly fixed to the floor. 桌子都牢牢地固定在地板上。
- The test shows that the medium frequency pulsed starting arc supermini unit works stably and reliably... 试验表明：工作稳定可靠，引弧能力强。
- The high frequency pulse 50-100/sec is known as dense wave, the low frequency pulse 2-5/sec termed as rarefaction wave. 频率快的叫密波（高频），一般在50-100次/秒，频率慢的叫疏波（低频），一般在2-5次/秒。
- Abstract: An alternative current medium frequency pulsed magnetron sputtering cathode power supply was introduced. 摘 要: 本文介绍了一种中频交流脉冲式磁控溅射靶极电源。
- The man jacked up his car to fix a flat tire. 那人用千斤顶把他的汽车顶起以修理漏气的轮胎。
- The nickel electroforming layers with nanocrystalline (nc) were obtained by using high frequency pulse current and strong electrolyte flushing. 采用高速冲液电铸装置、高频脉冲电流等方法,制备出金属镍纳米晶粒电铸沉积层。
- I bought a run-down farm house and plan to fix it up. 我买了一间破败的农舍，打算整修整修。
- In the paper, the high frequency pulse tube coolers (PTCs) developed for 80 K and below temperature application are introduced. 摘要首先介绍了作者开发的可用于80K及以下温区的高频脉冲管制冷机。
- We needed someone to fix the tape recorder. 我们需要有人来修理录音机。
- The paper introduction mechanism,application,selectio principal and some attentive items using of high frequency pulse TIG welding machine. 介绍高频脉冲TIG焊机的机理、用途、选型原则和使用时的注意事项。
- Using a high frequency pulse radar of 300MHz, radar sounding was carried out at 150 points on Collins Ice Cap and the echo profile of bedrock in 15km distance was given. 使用一台300MHz高频脉冲雷达，对柯林斯冰帽150个测点进行冰厚探测，描绘出15km冰床雷达回波剖面。
- I can fix up you with a used car. 我可以为你提拱一辆旧车。
- I tried to fix the date in my mind. 我试着把那个日期牢记在心。
- He promised to fix me up with a nice girl. 他答应为我介绍一位妙龄女郎。
- To drive the two-phase hybrid stepping motor, we adopt constant frequency pulse and subdivides drive circuit with M535, which with low speed vibration and precision orientation. 采用M535驱动器作为步进电机的驱动控制器，采用具有低速振动和定位精度高的恒频脉宽细分驱动电路；
