Scientists use a unit of measure called a decibel to measure the loudness of a sound.

A decrease or loss in a signal. Reduction of signal magnitude ( loss ) normally measured in decibels.

减小或 降低信号,信号减小或降低的多少通常用分贝来衡量.

A normal conversation reaches 55 decibels.

普通的谈话即可达55分贝.

The ordinate scale is linear in decibels.

纵坐标比例尺以分贝为单位是线性的.

As you all know, the normal noise threshold for private housing is 55 decibels.

正如你们知道的, 个人房子正常噪音为55分贝.

Forests to reduce noise pollution. 40-meter-wide forest belt noise can be reduced 10 to 15 decibels.

树林能减少噪音污染. 40米宽的林带可减弱噪音10—15分贝.

When subjected to 100 decibels or more, hearing damage can occur in just 15 minutes.

100分贝或100分贝以上的声音在15分钟内就会对听力造成损害.

The typical lawn mower makes about 90 decibels of noise.

典型的割草机发出的声响约为90分贝.

At a level of 140 decibels people feel pain in their ears.

在140分贝的时候人们的耳朵就会感到疼痛.

The intensity of a nearby jet taking off is about 110 decibels.

一架在附近起飞的喷气机的声音强度大约是110分贝.

Decibels measured in water are different from those measured on land.

水下测量的分贝值不同于在陆地上测量.

The amplitude defines how loud the sound is and is usually measured in decibels ( dB ).

声波实质上是 正弦曲线,它有振幅和频率.

Watch the monitor and tell me if the level goes above forty decibels.

看着监测器,如果超过40分贝就告诉我.

A hippopotamus'scream has been recorded at 115 decibels-louder than a jet airliner at takeoff.

河马发出的声音可以达到115分贝——比一架喷气式客机起飞时的声音还要大.

If you decide not to buy, the money you have spent on the survey is not recoverable.

如果你决定不买，你在调查上花的钱是收不回来的。

They're keenly aware that whatever they decide will set a precedent.

他们深知无论他们的决定是什么，都将开创先例。

She's not in position to decide.

她作不了主.

It's up to you to decide whether you go or not.

去还是不去,任你决定.

He was trying to decide whether the question was some sort of a trap.

他试图判断那个问题是不是个套。

We will be having a meeting to decide what to do.

我们准备开个会来决定怎么办。

It rests with you to decide whether to go or not.

去不去,在于你.