Groundwater has very important eco-value in arid and semi-arid regions.

Ustic vertisols, formed in semi-arid environment are peculiar soils.

干润变性土是发育于半干旱环境下的特殊土壤类型.

Xifeng are semi-arid continental climate, adequate light, four seasons, Wuhua Tianbao, outstanding.

西峰属于半干旱大陆气候, 光照充足, 四季分明, 物华天宝, 人杰地灵.

arid and semi-arid deserts

干旱和半干旱的沙漠

But some like me think that they found the Ark of the Covenant.

但有些人跟我一样认为是找到了方舟.

The teacher came in with a book under arm.

老师胳膊下夹着一本书进来了.

He came out of the library, book under arm.

他胳膊下夹着本厚书,走出了图书馆.

He walked into the classroom carrying a heavy dictionary under arm.

他胳膊下夹着一本厚厚的字典走进了教室.

The teacher came into the classroom, book under arm.

老师腋下夹着本书走进教室.

Our teacher comes into the classroom, book under arm.

然后翻译成中文:“老师进了教室, 胯下夹著一本书. ”

He called on the people to take up arms to defend their freedom.

他号召人民拿起武器保卫自由.

The oppressed people will take up arms and will never appeal for mercy.

被压迫人民将拿起武器,他们永远不会乞求怜悯.

The people were quick to take up arms to defend their homeland.

人民迅速拿起武器保卫自己的祖国.

We will take up arms against the invading forces.

我们会拿起武器,抵抗侵略势力.

Would you make a long arm for my pipe? It's on the shelf behind you.

请伸手帮我拿一下烟斗好 吗 ?它就放在你背后的架子上.

The country has decided to go to arms.

该国决定诉诸武力.

How far is one degree? It's roughly the width of a pencil at an arm length away.

那个一度的距离是多远 呢 ?大约是一支铅笔的宽度和手臂的长度.

For some idea of the Great Square's size, extend hand an arm length from your eye.

这四方形的大小可以说是从你的手臂和手掌伸展开到眼睛的距离.

Leg of the short arm length, head forward.

腿短臂长, 头部前倾.

So, they often keep material at an arm length.

所以让自己经常与物保持一定的距离.

At length . To keep some one at arm length.

这是和某人保持一定距离的意思.