黄土

Soil and water loss in the gullied loess hilly region in northern Shaanxi attracts worldwide attention, where soiseasonable distribution of contour shrub belt is of significant soil and water conservation effect with runoff decrease of over 30%, sediment reduction of more than 50%, and it can also increase plant coverage of 15％ to 20% on slope farmland and forms shrub network on hill slope,and change the situation of ecological environment deterioration and sparse vegetation.

摘 要］陕北黄土丘陵区的水土流失问题举世瞩目，而坡耕地的水土流失尤为严重。资料表明，配置合理的等高灌木带具有较强的保持水土效益，其径流削减率在30%以上，泥沙削减率在50%以上，可增加坡耕地植被覆盖度15%～20％，在峁坡上能很快形成林网，大大改观坡耕地长期植被稀疏、生态环境恶化状况。

The sediment retained by dams at early stage in the watersheds where the treatment degree is higher in the gullied rolling loess area of Gansu is mainly gravity erosion coming from gullies and banks of reservoir areas.

甘肃黄土丘陵沟壑区治理程度较高的流域，前期坝库拦蓄的泥沙主要来源于坝库区沟岸的重力侵蚀，其泥沙量占坝库拦蓄泥沙总量的 83 63 %，坡面侵蚀仅占 16 3 7%。

It is shown by the results of observation and analysis on the tests of water collection and saving utilization of hillside orchards located in the gullied rolling loess area that to build two encircling water collection works in the orchard to store excess rain.

对黄土丘陵沟壑区山地果园集流节水利用的定位试验观测和分析的结果表明：将果园修成&回&字形集水面，将超渗产流蓄贮，既可以减少果园水土流失，又能满足果树旱季用水；采用地膜覆盖、秸秆覆盖、绿色覆盖措施可以有效地减少地面蒸发，调节地表温度，增加土壤有机质，达到高效利用雨水资源的目的。

The ravines and gullies of the loess plateau have brought much inconvenience to the agricultural production, transportation and people's daily life.

黄土高原的沟壑化，给农业生产、交通运输以及人民的日常生活带来了诸多不便。

I stood in front of heaped earth, looked uneasy.

我站在一钵黄土前，神情忐忑。

The loess caps the ridges and knolls -- pressed on the sky like the waves of an ocean.

黄土帽——梁和峁像大海一样托着那蓝天。

On the opposite side, looking on as the waves of loess ridges and knolls spilled themselves with

蓝青色的山西省的崇山如一道迷朦的石壁，正在彼岸静静肃峙，仿佛注视着这里不顾一切地倾泻而下的黄土梁峁的波涛。

The lofty blue mountains of Shanxi Province were like a blurry wall standing gravely and silently on the opposite side, looking on as the waves of loess ridges and knolls spilled themselves with abandon over the edge.

蓝青色的山西省的崇山如一道迷朦的石壁，正在彼岸静静肃峙，仿佛注视着这里不顾一切地倾泻而下的黄土梁峁的波涛。

There are three effects that may be important in producing this trend. First, lowtemperature oxidation preferentially affects the finer single-domain magnetites responsible for the Hopkinson peak, which is therefore suppressed in the more oxidized loams. Second, the possible production of uniaxial magnetite with shape anisotropy can also lead to a relatively muted Hopkinson peak. There is, additionally, a third alternative, and the one preferred here, that the natural alteration processes involved in pedogenic susceptibility enhancement have probably depleted the supply of ironbearing precursor phases, so that less new magnetite is formed on heating.

产生这种特殊热磁性质的可能原因如下：第一，成土过程中的低温氧化作用减弱了磁铁矿的Hopkinson效应；第二，可能是成土过程中生成的一向延长的针状磁铁矿颗粒表现出较弱的Hopkinson效应；第三，随着成土作用增强，现代黄土、黑垆土中的硅酸盐、粘土矿物因受土壤化作用分解而越来越少，加热过程中分解产生的磁铁矿造成的磁化率增强相对于其初始磁化率也就越来越小，从而产生越来越弱的Hopkinson/alteration峰，本文认为这是最主要的原因。

All of these were fresh and unknown to Shangguan who just now crept out of the yellow clay room of the reforming farm. His anxious heart sunk even more.

这一切，都让刚刚从劳改农场的黄土屋里钻出来的上官金童感到新鲜、陌生，那惴惴不安的心情更加沉重了。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。