您要查找的是不是：
- Ultrasound is sound that has a frequency above the audible range of man that is greater than 20 kHz. In imaging the usual range of frequencies used is between 2 MHz and 10 MHz. 超声是一种声波,在医学影象中,超声仪使用2MHz-10MHz间的声波,此一频率已远远超过人耳所能听到的20khz。
- This approach automatically results in a current frequency twice as high as the chopper frequency so that the ripple of the phase currents is 22 kHz, i.e. it is outside of the audible range. 这种做法的结果会自动在一电流频率高一倍菜刀频率，使纹波的阶段，电流是22千赫，即是以外的发声范围。
- I was reading a magazine when the phone rang. 电话铃响时我正在看一本杂志。
- The melody still rang in her ears. 那个旋律仍然在她的耳际荡。
- Determination of limiting audibility range in lecturing hall having natural speech acoustics 语言用厅堂在自然发声条件下听闻极限距离的确定
- Their refusal rang the knell of our hopes. 他们的拒绝是我们希望破灭的凶兆。
- It has come within the range of practical politics. 这就属于可实施性政治的范围了。
- He rang off without giving his name. 他名字也未说就挂断了电话。
- We sell a wide range of ales and stouts. 我们出售种类繁多的浓啤酒和黑啤酒。
- Mysteriously, there was no answer when I rang. 真怪，我按了铃，但没人应。
- The playground rang with children's shouts. 游戏场上到处都是儿童的喊叫声。
- Come and see our range of gardening tools. 来瞧瞧我们的成套园艺工具吧。
- I rang you but couldn't get through. 我给你打电话，但没有打通。
- It came within my range of vision. 该物体进入了我的视野。
- I rang you several times but couldn't get through. 我给你打了几次电话,可是没打通。
- Love is sometimes put in range with a career. 人们往往认为爱情和事业是并驾齐驱的。
- The square rang with hurrahs of the crowd. 人群的欢呼声响彻广场。
- I was playing on the piano when the telephone rang. 我正在弹钢琴，电话铃响了。
- He rang off before I could explain. 我还没来得及解释，他就把电话挂上了。
- The telephone rang even as he was going out. 他刚要外出,电话铃响了。
