查询词典 sand dune

The results showed the seeds of ephemerals mainly distributes in 0～5 cm soil and there are few seeds under the 5 cm soil.The density of the seed banks is different among the different parts of the sand dune.The density decreases gradually from the foot to the top.

结果表明：短命植物种子主要集中分布于地表0～5 cm土壤中，5 cm以下土壤中极少存在有活力的种子；沙丘间及沙丘不同部位的种子库密度大小不同，密度自坡底随高度增加逐渐减少，坡底、坡中部及坡顶部密度分别为124粒/m2、91粒/m2、66粒/m2。

The density of the foot 、middle part and top are 124grain /m~2、91 grain /m~2、66 grain /m~2,the seeds is more little windward than the leeward.The density of seed banks in windward is 81grain/m~2 and the leeward density is 100grain/m~2.The seed of ephemerals bourgeoning reaches the pinnacle on April and May.The diversity of different parts sand dune is different,but the differences do not reach the marked level.The similarity is high between the seed banks and the vegetation.

迎风坡种子库密度比背风坡面少，迎风坡种子库平均密度为81粒/m2，而背风坡种子库平均密度为100粒/m2；短命植物种子在4月上旬达到萌发高峰，沙丘不同部位物种多样性存在差异，土壤种子库和地上植被存在较高的相似性，此外短命植物在沙丘不同部位的分布存在较高的空间异质性。

In wetter habitats, forbs were more abundant and accounted for the majority of aboveground biomass, whereas grasses became more important in dryer habitats. Shrubs and sub-shrubs increased with decreasing soil water availability and their relative biomass rapidly increased in degraded steppe and sand dune; perennial grasses had significantly higherδ〓C values than other PFGs; the δ〓C values of perennial grasses and forbs increased with decreasing soil water availability, while those of shrubs/sub-shrubs showed an inverse trend.

在较湿润生境，多年生杂类草更加丰富并构成了群落地上生物量的绝大部分；而在较干旱生境下，多年生禾草在群落中起更重要的作用；随着土壤含水量下降，灌木和半灌木逐渐增多，且在退化草地和沙地中其相对生物量迅速增加；多年生禾草δ〓C值显著高于其它功能群；随着土壤水分可利用性降低，多年生禾草和杂类草的δ〓C值表现出增加的趋势，而灌木/半灌木则表现出相反的趋势。

This crescent-shaped ridge of sand dune in Oman was formed by strong trade winds that form a smooth hill facing the wind and concave slipface on the back.

这新月形的山脊沙丘在阿曼是成形的强有力的贸易风，形成平稳小山所面临的风和凹的slipface在后背。

The towering ridge of a sand dune in the Arabian Desert points to the afternoon sun.

意译：沙漠风景图片。高耸的山脊沙丘在阿拉伯沙漠对准下午太阳。

A paraglider rides the winds above the Cerro Dragon sand dune in Chile's Atacama Desert.

滑翔伞乘坐以上的大风山龙沙丘在智利的阿塔卡马沙漠。

A paraglider rides the winds above the Cerro Dragon sand dune in Chile's Atacama Desert.

一个滑翔伞乘风在山龙沙丘上面在智利的阿塔卡马沙漠。

A paraglider rides the winds above the Cerro Dragon sand dune in Chile's Atacama Desert.

一个滑翔伞乘风在cerro龙沙丘在智利的阿塔卡马沙漠之上。

Tourists career down a mountainous sand dune in the aptly named Valley of the Moon region of Chile's Atacama Desert.

旅游者愿意速滑下到山一样的沙丘，最合适的是智利的&月亮谷&。

Photo Gallery: Climate A paraglider rides the winds above the Cerro Dragon sand dune in Chile's Atacama Desert.

意译：气候的图片集。一个滑翔伞乘风在cerro龙沙丘在智利的阿塔卡马沙漠之上。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷