frogs will usually breed in any convenient pond.

青蛙通常在任何适宜的水塘里繁殖。

Thousands of frogs croaked in the reeds by the riverbank.

成千上万只青蛙在河岸的芦苇中呱呱地叫。

I spent one whole night by a swamp behind the road listening to frogs.

我整个晚上都在这条路后面的一个沼泽地旁听蛙鸣。

frogs eat pests which destroy crops and carry diseases.

青蛙吃破坏庄稼、传播疾病的害虫。

This wet area also attracts frogs, toads and newts.

这片潮湿地区也吸引了青蛙、蟾蜍和蝾螈一类的生物。

the croaking of frogs

蛙鸣

He wrote a learned book on frogs.

他写了一部有关青蛙的学术著作.

frogs produce slime to keep their skin moist.

青蛙分泌出黏液来使皮肤保持湿润.

Several frogs were hopping about on the lawn.

有几只青蛙在草地上跳来跳去.

The frogs haven spawned yet.

青蛙还未产卵.

The pupils are experimenting on frogs.

学生们正用青蛙做试验.

The cruel boy threw stones at the frogs.

那个残忍的男孩用石头投掷青蛙.

A few days after the eggs are laid, young frogs which are called tadpole come out of them.

卵产下几天以后, 称为蝌蚪的青蛙幼虫就从卵里出来了.

frogs will usually breed in any convenient pond.

通常青蛙会在任何条件适宜的池塘中繁殖。

frogs in the tangled grass croaked rhythmic accompaniment.

我在这片时中觉得心上比较平时恬静好些.

There are a lot of frogs in the marsh.

沼泽里有许多青蛙.

frogs began to croak with the rainfall.

蛙随着雨落开始哇哇叫.

We observed the circulation of blood in frogs.

我们观察了青蛙的血液循环.