Swallows come by groups at the advent of spring.

春天来临时燕子成群飞来。

Spring and autumn are my favorite seasons.

春秋是我喜欢季节。

The violet is a dainty spring flower.

紫罗兰是娇艳春花。

To the spring, they have been possible to return to the pinery, free happy life.

到了春天，他们又可以回到松林，过着自由愉快生活。

The air was scented with spring flowers.

空气中充满了春天花朵。

Her anxiety has sprung from a misinterpretation of the report.

她不安是由于这篇报道错误引起。

These birds migrate northwards in spring and southwards in fall.

这些鸟春天向北迁徙, 秋天向南迁徙。

The robin is the messenger of spring.

知更鸟是报春使者。

The trees leaf out in the spring.

树在春季长叶。

In spring the yard has a freshening aspect.

春天, 院子里呈现出一派清新景象。

They see gains of 5 to 10 percent this spring.

今春他们利润增长百分之五到百分之十。

A fungus of ugly little houses sprang up.

突然出现一排难看小屋。

She lowered her eyelids, then sprang them open.

她低垂着眼睑, 然后突然睁开。

500 companies sprang up to exploit this new technology.

一下子有500家公司争先恐后利用这一新技术。

The rabbit sprang from its grassy couch.

兔子从草丛中跳出。

The leaves on the trees shimmered pale green,almost silvery in the spring sunlight.

树上叶子闪烁着淡绿色光,在春天阳光下几乎是银白色。

I feel like a wanderer in a land of Hot Springs and tores.

我感觉像一个漫游者流浪于温泉与花托之地。

They are trying to spring a surprise on us.

他们打算告诉我们一个惊讶消息。

After such a long thirsty journey, the travelers drank deep of the fresh spring.

经过使人口渴长途旅行后, 旅客们痛饮清凉泉水。

What are the chances of these molecules springing spontaneously into existence?

这些分子自然形成可能性有多大？