土壤发生

This paper reviewed microsclerotia or spores in soil are stimulated to germinate by host root exudates, hyphae colonizes on the surface of root, pathogens penetrate epidermis and develop in cortex, expand on stem and leaf, and symptom development, shows that host plant develops various barriers to restrain this fungus invasion.

本文系统探讨了土壤中微菌核或孢子受寄主根系分泌物的刺激，开始萌发、产生的菌丝在寄主根表面定殖、穿过表皮、在皮层中发生及在寄主体内扩展和症状形成等黄萎病菌侵染棉花的过程，阐述了寄主植物形成多级防御反应阻击病原菌的入侵。

He sent it to the lawyers, they hemmed and hawed, and he lost his moorings.

这种连小孩都不会犯的错竟然会发生在世行行的右角，雨水先落在窗前铁栏杆再顺着花草的叶脉滴到盆子的土壤里。

Dogs with CPV are at risk of intussusception,a condition where part of the intestine prolapses into another part.

肠炎型 犬通过口腔接触到CPV2污染的粪便、感染的土壤或者携带病毒的污染物而发生感染。

The result shows that geopolymeric reaction is occurred when metakaolinte is activated by the compound solution of sodium silicate and sodium hydroxide, and the amorphous geopolymeric cement with layer structure and combination water is then formed.

结果表明：在氢氧化钠溶液和水玻璃的混合溶液的激发下偏高岭石发生了土壤聚合反应，生成了无定形的土聚水泥；该土聚水泥呈层状结构并含有非结合水

Grounding grid is essential to the safety of substation, however, the corrosion caused by earth may result in thinness even break of the grounding down-lead and horizontal equal-voltage conductor. This will lead to fault spread when grounding fault occurs, and will be dangerous to human and facilities.

接地网对变电站安全运行至关重要，但土壤的腐蚀可能使接地引线和水平均压导体变细甚至断裂，当系统发生接地故障时可能造成事故扩大，危及设备和人身安全。

Due to use of harmful pesticides, insecticides, rich soil nutrients for agriculture, annual mass bathing and daily washing activities, the usual practice of dumping of solid waste, many of which may be non-biodegradable and toxic, effluents either from domestic sources including hotels, resorts and ashrams or industrial sources, continuous removal of the sand and stones from river beds, destructive fishing methods, construction work going on in river such as dams and channelization, deforestation, chemicals and many other reasons , the list of which is long have impede the natural physical, chemical and biological quality of river Ganga.

由于使用有害农药，杀虫剂，肥沃的土壤养分用于农业，每年大规模洗澡和日常清洗活动，按照惯例倾倒固体废物，其中许多可非生物降解和有毒，废水是由国内来源包括酒店，度假村和ashrams或工业源，继续去除沙子和石头河床，破坏性的捕鱼方法，建设工作发生在河流如水坝和通道，砍伐森林，化学品和许多其他原因，名单这是长期以来一直阻碍自然物质，化学和生物质量河流恒河。

But along with the social economy development, the vegetables consumption quantity is daily increased, the great scale of the greenhouse vegetables production is higher and higher day after day and a special reason is benefit actuation. It emerges one batch of vegetables types relatively sole specialized production base one after another, which causes the original cropping system to disintegrate objectively, the farmer who is engaged to run some specific vegetables production is increased day by day, the vegetables type are restricted frequently by the high production and economic efficiency fruit vegetables, the tendency of specialized production is suddenly revealed day after day, finally is causes the soil environment to worsen, the vegetables plant disease to be serious, the output to reduce, the quality and the series barrier of continuous copings to occur and the facility vegetables production further development to be cut down.

但随着社会经济的发展，蔬菜消费量的日益增加，温室蔬菜规模化生产日渐升温，加上效益驱动等原因，相继涌现出一批蔬菜种类相对单一的专业生产基地，客观上导致原有耕作制度瓦解，从事某一特定蔬菜生产的农民日益增多，蔬菜种类常常局限于生产经济效益高的果菜类，专业化生产趋势日渐突显，结果导致土壤环境恶化、蔬菜病虫害严重、产量降低、品质下降等一系列连作障碍的发生，严重威胁着设施蔬菜生产的进一步发展。

Based on the field surveys on a wide scale, the systematic studies were made on soil acid properties, particle fractions, exchangeable performances, saturated base, free feeric properties, clay chemical components, clay mineral types and their properties of genesis.

在大量野外调查的基础上，系统地研究了土壤的酸性特征、颗粒组成、交换性能、盐基饱和度、铁的游离度、粘粒化学组成及粘土矿物类型等发生学性质。

Seen from the functional group, perennial grasses and forbs had stable compositions, but compositions and number of shrubs, half shrubs, small half shrubs, annuals and biennials were unsteadiness, where aboveground biomass in warmed plots was much difference with control. Nitrogen addition may enhance aboveground biomass obviously from latter growth stages.

施用氮肥的效果在植物生长后期才明显的表现出来，施氮样地地上生物量明显提高；增温和施氮作用使地下生物量发生了一定变化，但无显著差异；通过多元逐步回归发现，影响植物群落地上生物量和地下生物量最显著的因子是10-20cm土层的土壤湿度。

The characteristic of ecosystem changes along the environmental gradients and the soil is one of its important indicators.

随着环境梯度的变化，生态系统的特征会发生明显的变异，土壤是其重要的表征要素。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失