沙丘

Among the 5 enzymes, the increase of activity of saccharase was most significant, whose measurements in 0~10 cm soil of 5, 10 and 22 age plantations were 76.80, 167.27 and 261.63 times respectively of the semi-moving sand dune. The soil biological activities in 22-year plantation were already close to that in the natural community.

土壤酶中蔗糖酶的活性增加最为迅速，5、10和22年生群落0~10cm土层中蔗糖酶的活性分别是半流动沙丘的76.80， 167.27和261.63倍。22年生群落的土壤生物活性己接近于天然群落，处于相对稳定的状态。

The purpose of this study is to reveal the change characteristics of biological properties of sandy soil and its development trend under the establishment of C. microphylla plantations in flowing sand dune. With semi-moving sand dune and natural community as controls, the activities of phosphomonoesterase, saccharase, protease, urease, dehydrogenase and the Contents of microbial biomass C, N, P of the soil in an age sequence (5-, 10-, 22-year) of C.

为探讨采用小叶锦鸡儿固定流沙后，土壤生物活性的变化特点和发展趋势，选取5、10、22年生小叶锦鸡儿人工固沙群落为对象，以半流动沙丘和天然群落为对照，研究了人工固沙群落发育过程中土壤磷酸单酯酶、蔗糖酶、蛋白酶、脲酶、脱氢酶的活性和微生物生物量C、N、P质量分数的变化特征。

Salerno is a busy harbor city of Italy, which has a beautiful seacoast line. In the east waterfront of Salerno, a new park is going to appear with the theme of "Waves of Dune".

编者按：萨勒诺是意大利一个繁华的港口城市，有着美丽的海岸线，在城市的东部海滨，新规划的公园将以全新的"流动的沙丘"的主题展现在人们眼中。

We have over a sand dune belt, whether tracked or wheeled armored vehicles are difficult to travel above, this is the best defense workers in advance of the natural barriers.

我们飞过一条沙丘带，不管轮式装甲车还是履带式都很难在上面行驶，这是防御工事前最好的自然屏障。

After eating, I hiked to Lake Michigan, and sat up on a large sand dune.

进食后，我徒步到密歇根湖和坐起来，在一个大沙丘。

Did you see a plume of dust between the sign and the sand dune in the previous picture?

KittyChu译：你有看到上张照片中标帜及沙丘间的灰尘烟雾吗？

An example of the first line of defense would be a sand dune protecting an ocean front cottage or road.

举一个第一个防守线的例子，就是一个保护靠近海岸的农舍和道路的沙丘。

To understand what the protection you are seeking actually is you will have to look to the other symbols in the dream and correlate it with the sand dune symbol.

要了解什么保护您正在寻求，其实是你将要照顾到其他符号在梦想和关联，它与沙丘的象征。

The change of context will be radical: with a switch from earth to sand and especially a dune portion of close to 30 kilometres.

最明显的是地貌的变化：赛道从土地进入沙漠，特别是将尽30公里的沙丘地带。

The characteristics of leaf water potential growing on top of sand dune is more obvious than that of at lowland.

无不定根匍匐茎的小枝水势比有不定根的略高，生长在沙丘顶部的臭柏，这种特征比滩地的明显。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐