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

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.

The present leaders have to decide whether to stand down and hand over to a younger generation.

现任领导层必须决定是否应退居二线，把重任移交给更为年轻的一代。

The results will decide if he will win a place at a good university.

这些成绩将决定他能否上一所好大学。

I can't decide what to do. I'll sleep on it and let you know tomorrow.

我不能决定该怎么做. 我考虑一下,明天告诉你.

Let's put our heads together and decide how the problem is to be tackled.

大家合计合计这个问题该怎么处理.