薄土

The results showed that compared with soil culture, the root cap was not obvious with less amyloplast and polysaccharose substance under water culture. The root epidermis under water culture was thinner than that of soil culture, with little root hair or not, in which cortex parenchyma tissue developed with big cell, solution proliferative aerenchyma in intercellular space, and thin cell wall. However, the root cap under soil culture was big, with strong PAS reaction and no aerenchyma tissue.

结果表明：水培后根冠不明显，淀粉体较少，多糖类物质较少而土培根根冠体积较大，淀粉体较多，多糖类物质多，土培根PAS反应强烈；水培根表皮厚度比土培根小，水培根根毛少或退化消失；水培根皮层薄壁组织发达，细胞大型，壁薄，细胞间隙中含有溶生性通气组织，土培根皮层未见通气组织。

By field sampling, some original soil microbiotic crusts were gathered and their physico-chemical properties were analyzed. The results revealed that the longer the sand dunes have been fixed, the thicker and the more biocrusts are formed. The thickness of the crusts under four different types of plant community ranges within 0.3 ~ 1.5cm.

物理结皮通常是土壤粘粒在雨水、径流等外力的物理作用下，使土壤表层孔隙堵塞而成型的一层土表硬壳；生物结皮是有不同种类的低等生物组分与其下很薄的土壤共同形成的一个复合的生物土壤层[2]。

Results:TLC method could be used for Rhaponticin examination in both Rhubarb and Processed Rhubarb.

结果：土大黄苷薄层检查法对大黄药材及饮片的检查均适用。

Methods:On the basis of traditional method and method set in Chinese Pharmacopoeia(2005),TLC method and HPLC method for Rhaponticin examination were established.

对传统方法、中国药典方法检查土大黄苷进行了研究，在此基础上建立了以土大黄苷为对照的薄层色谱法和高效液相色谱法检查大黄药材及饮片中土大黄苷。

Replacing and treating thinner and softer foundation with gradated sand-stone cushion is economical and practical.

用级配砂石垫层换填处理薄层软土地基是一种经济实用的方法。

With use of acid-forming ammonium fertilizers, this tends to cause a shallow, acid layer at the soil surface after some years.

随着生理酸性铵态氮的使用，数年后便可能在土表形成一酸性薄层。

Ideally suited for sewing two needle fancy and functional seams,specially on closed shoeuppers.Owing to the combination of wheel feed nat driven roller presser,the machine stitches over cross seams with ease.Accurate and uniform setting of stitch es and i

适合于鞋面的车缝及饰缝，特殊综合送，车薄料不土起皱，车厚料缝迹美观，釜座位于针的右方，方便于童鞋及各式鞋类的车蓬，缝目设定精确一致，大小可自由调整，设有操作简便的安全离合器，可减小梭头的损坏，采用球型及针状轴承，配合连杆式天平，磨擦小免保养。

The characters of karsts soil are four:(1) soil layer is thin and the soil is barren;(2) the soil is not continuously distribution and separated by the stone-teeth;(3) water and soil resources are separated;(4) slopping field is more, the flat is few.

岩溶区土壤资源的特征是：①成土速率慢，土层薄，土壤贫瘠；②土被不连续，多被石芽所间隔；③水土资源分离；④坡地多、平地少。

Many deeply fossilized items were found from the thin-beded red sandy clay: r 36 species of mammalian fossils, including thick-jawed giant deer, Saber-tooth tiger, Horse, etc.

化石多半产自薄层的红色砂质土中，石化程度深，化石数量大，保存好，有肿骨大角鹿、更新獐、剑齿虎、大丁氏田鼠、三门马和双角犀等36种哺乳动物。

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