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单词 Ultrasonic wave
释义

Ultrasonic wave

英语例句库

Objective:To observe the preventive and therapeutic effects of ultrasonic wave treatment on faciocervical scar.

探讨超声波对面颈部瘢痕的处理效果。

In contrast with different extraction methods, the alkannin could be extracted quickly and effectively by the ultrasonic wave.

研究了超声波法和有机溶剂法提取天然紫草色素的工艺条件,超声波法可明显提高色素的提取速率。

Then ultrasonic wave and solvent were exerted into the crystallizable solution to change its natures,adjust the formation of crystal water and affect the change of crystal configuration.

然后通过施加超声波、溶剂等来改变结晶溶液的特性,以调节结晶水形成,干预晶体构型变化。

原声例句
当月 CNN 10 学生英语 2021年4月合集

What about alternative cleaning methods like LED blue lights and ultrasonic waves?

替代清洁剂的方法,如LED蓝光和超声波怎么样?

VOA Special 2020年11月合集

It sends ultrasonic waves to create sound pockets by the user's ears.

它会发出超声波在聆听者的耳朵旁形成声腔。

VOA慢速英语_科技

One method uses ultrasonic waves to recycle these important elements without having to break them apart.

一种方法是利用超声波来回收这些重要元素而不必将它们分解。

朗文OCLM-01单词

Ultrasonic waves travel at around 300 metres per second.

【second】超声波的传播速度约为每秒 300 米。

朗文OCLM-01单词

Ultrasonic waves are at a higher pitch than the human ear can hear.

【pitch】超声波的音高超出了人耳可以听见的范围。

自然杂志:科技

The ripple on the surface of the water is created by ultrasonic waves emanating from a speaker underneath.

水面上的涟漪是由下面的扬声器发出的超声波产生的。

中文百科

超声波 Ultrasound

(重定向自Ultrasonic wave)
通用电子生产的医疗超音波器材
红:次声波、蓝:可听声波、绿:超声波
超音波医疗扫描

超音波Ultrasound、超音波)是指任何声波或振动,其频率超过人类耳朵可以听到的最高阈值20kHz(千赫)。超音波由于其高频特性而被广泛应用于众多领域,比如金属探伤,工件清洗等。

某些动物,如狗只、海豚、以及蝙蝠等等都有着超乎人类的耳朵,也因此可以听到超声波。亦有人利用这个特性制成能产生超音波来呼唤狗只的犬笛。

所谓超音波,只透过具有弹性与惯性介质,如空气,当空气本身一旦产生膨胀或压缩时,透过其分子的运动而有波动的传拨产生。因此,音波无法在真空中进行传播。人类听觉能察觉波动,称之为声音。此时音波,即称之为可听波。

英语百科

Ultrasound 超声波

(重定向自Ultrasonic wave)
Ultrasound image of a fetus in the womb, viewed at 12 weeks of pregnancy (bidimensional-scan)
An ultrasonic examination
Fetal ultrasound
Approximate frequency ranges corresponding to ultrasound, with rough guide of some applications

Ultrasounds are sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is no different from 'normal' (audible) sound in its physical properties, except in that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy, young adults. Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz.

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更新时间:2025/6/17 23:18:54