The track star outran all of his competitors.

It is our responsibility to put them on the right track.

我们有责任帮助他们走上正道.

Our horses plodded down the muddy track.

我们的马沿着泥泞小路蹒跚而行。

She branched off down the earth track.

她改变路线，沿着土路走了下去。

He has a proven track record in marketing.

他有可靠的销售业绩记录。

Alluvial soils usually grow the best crops.

淤积土壤通常能长出最好的庄稼。

Such plants could grow in the world's worst soils without costly help.

这类植物用不着投资就能在世界上最差的土壤里生长.

Molybdenum deficiency is found when legumes are grown on acid soils.

在酸性土壤上种植豆科作物时常发现缺钼.

Each climatic environment places its own stamp upon the soils developed there.

每一种气候环境,对该地发育的土壤都能留下自己的痕迹.

Irrigation timing is important due to light rather shallow soils.

由于土壤轻松,土层又浅,及时灌溉是很重要的.

Fruit trees will not tolerate wet soils during the growing season.

在生长季,果树不耐土壤过湿.

The soils have a rusty red tint.

那里的土壤呈锈红色.

Less chemical gets into the sub-soil which is particularly important with the light, tropical soils.

进入底土的化学物质会减少，这对土质松软的热带土壤而言尤为重要。

The universe seems to be rapidly expanding its component galaxies moving ever farther apart.

宇宙似乎在膨胀,它的组成部分――星系互相离得越来越远.

Other galaxies are placed irregularly in space.

其它星系不规则地位于太空中.

They turned their telescopes towards other nearby galaxies.

他们把望远镜转向附近其他星系。

There is a curious feature in the spectra of spiral galaxies.

在旋涡星系的光谱中有一种奇妙的特征.

We still don't know how many galaxies there are in the universe.

我们还不知道宇宙中有多少个星系.

Most galaxies occur in pairs or in small multiple groups.

大多数星系成双或几个成一小群.

Galactic surveys show that distant galaxies are not as evenly distributed in space as theory predicts.

对银河系的研究表明，遥远星系在太空中的分布并不像理论所预言的那样均匀。

As the universe expands, these galaxies stay the same size.

当宇宙扩张之时, 星系的大小保持不变.