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Methods: 492 patients with primary teeth disease were divided into three groups randomly, these teeth were obturated with root canal filling paste, paste iodoformzinc oxide eygenol and paste iodoformcalcium hydroxide respectively.The clinical efficacy was observed at 3 months,1 year and 2.5 years later after root canal therapy.

492颗乳患牙随机分为3组，分别以根管充填糊剂、碘仿氧化锌糊剂和碘仿氢氧化钙糊剂作为根管充填材料进行根管治疗，观察术后3个月、1年和3年的临床疗效。

The distribution of the root meanings carried by must which expresses modality of high value and should which expresses modality of median value outnumbers their epistemic meanings in both CLEC and LOB. However, Chinese learners tend to overuse root meanings carried by them.

CLEC和LOB中高度情态动词must以及中度情态动词should的根意义在数量分布上超过它们的认识意义，但是，中国学习者又呈现过多使用根意义的趋势，而低度情态动词could在两个语料库中有着相似的意义分布。

The host plants will be damaged when infected by root-knot nematodes. The response of the host plants parasitized can also produce evident impact to the root-knot nematode, resulting in adaptation of the nematodes specific to different host plants.

此种寄生行为会对植物造成一定的伤害，而寄主植物的反应也会对根结线虫产生显著的影响，从而引发线虫的种种高度专化性适应。

Root-knot nematodes (Meloidogynespp.) take in adequate nutrition and complete a life cycle by parasitizing the root system of host plants.

根结属(Meloidogyne Gǒldi)线虫必须寄生于寄主植物根系并获取所需的全部营养，才能完成其完整的生活史。

Adding both NAA and BA to medium would promote the percentage of callus formation of tip and podding without root, but would inhibit the podding with root.

同时添加NAA及BA对子房柄形成愈伤组织及不发根结荚有加成的促进作用，但对发根结荚则有加成的抑制作用。

Approximately one-third of the root system should be pruned off to stimulate new root growth.

大约三分之一的根系修剪第三，应把促进新根的生长。

The result shows: in 0~360 kg/hm^2 fertilizer can improve the plant height, dry matter accumulation of maize, nitrogen accumulation, root vigor, leaf nitrate reeducates activity, chlorophyll content and yield, meanwhile the leaves' nitrate reeducates activity, dry matter accumulation and the final output of wheat, root activity and other indicators were significantly correlated; Cultivating under the same conditions and dropping the fertilizer amount from 360 kg/hm^2 to 315 kg/hm^2, the dry matter accumulation will be increased, the roots vigor and leaf nitrate reeducates activity will be strengthened, but the yield are not obviously different in the same treatment.

结果表明：在0~360kg/hm^2的施肥范围内，肥料能显著增加玉米植株的株高、干物质积累盆、叶绿素含量和籽粒产量，提高根系活力、叶片硝酸还原酶活性；同时硝酸还原酶活性、干物质积累量、根系活力和叶绿素含量等指标与玉米最终产量呈显著正相关；在相同的栽培条件下，将施肥量从360kg/hm^2降至315kg/hm^2，植株的于物质积累量增加、根系活力、叶片硝酸还原酶活性增强，但处理间籽粒产量无显著差异。

After the drought treatment plant was rehydrated and root weight accumulated rapidly, indicating that root system was move sensitive to the change of soil environment than the aboveground pad.

抽穗期干旱胁迫对黍子的影响大于拔节期，这是由于拔节期胁迫后恢复水分供应，根系有较长的时间与空间进行补偿的结果。

We adopted many forestry techniques, including scarifying, weeding, draining, fertilizing, digging far-between dyke, choosing and breeding eximious clone. We also took measures of excavating aperture and irragating root, directly watering root, daubing remedy, stubbing died trees and sterilizing soil in the aperture.We carried through integrated preventional measures of chemical prevention and biological prevention, by using 200×CuSO4, 70% mancozeb 800×5% Chlorothalonil 800×, and Suillus grevillei. All of the meaures got favorable results. The preventional effect exceeded 72%. The incidence of disease descended from 15.5% in 1998 to 2.8% in 2002.This kind of disease was controlled on the whole.

自1998年开始，经过5年的系统研究，通过松土除草、排水施肥、挖隔离沟，选育优良无性系等林业技术措施；采用挖穴灌根法、直接浇根法、涂药法、死树挖除并对穴内土壤消毒等方法，使用硫酸铜200倍液、70％代森锰锌800倍液、5％百菌清800倍液和厚环乳牛肝菌进行化学防治和生物防治等综合防治技术，均取得了很好的效果，防治效果达72％以上，发病率由1998年的15.5％，下降到2002年的2.8％，使该病基本得到了控制。

The results show that, under each drip irrigation treatment before the tasselling stage of spring maize, the fluctuation of average soil water content and soil matric potential at different soil depthes are comparative low under high frequency drip irrigation treatment, and the HDI can hold stable soil water content. The drip irrigation can obviously delay the effect of air temperature on the soil temperature, which was influenced by irrigation process, soil water content and crop growth stages. In addition, the irrigation frequency affects the spring maize root distribution in the soil, and the HDI improves the probability of root distribution in upper soil(0~40 cm). The yield difference of spring maize for irrigation frequency treatments is not significant under the typical field irrigation model combined irrigation with precipitation.

试验结果表明：在春玉米抽雄期以前阶段实施的滴灌各处理中，高频滴灌下土壤平均含水率和不同深度处的土壤基质势波动幅度较小，高频滴灌下土壤水分能保持在一个比较稳定的范围；土壤温度受灌水过程、土壤含水率及作物生育阶段的影响较明显，滴灌能显著延迟气温对土壤温度的影响；灌水频率对春玉米根系分布存在一定影响，高频灌溉能显著促进春玉米根系在上层土壤(0～40 cm)中的分布；此外，在这种典型的灌溉和降雨相结合灌溉模式下，不同灌水频率下玉米产量差异不显著。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。