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The researchers estimated the numbers of white-backed vultures at 11,000 from tens of millions in the 1980s.

研究人员估计，一九八0年尚有数千万只白背秃鹰，但现在只剩一万一千只。

Companies specializing in white-backed black edible fungus from edible fungi such as the processing, and export business, the company's main products sold to the United States, Germany, the Netherlands, Norway, Sweden, Israel, Saudi Arabia, Australia, Singapore, Malaysia, the Philippines, Japan, and so on.

公司专业从白背黑木耳等食用菌的加工、出口业务，公司主要产品销往美国、德国、荷兰、挪威、瑞典、以色列、沙特，、澳大利亚、新加坡、马来西亚、菲律宾、日本等等。

Dynamic process and spatial pattern of the white-backed planthopper, Sogatella furcifera nymphs after they immigrated into the rice were studied to provide a theoretical basis for its integrated control.

研究白背飞虱迁入后其后代若虫在稻田间的聚集与扩散的动态过程和空间分布规律，为综合防治提供理论依据。

The population of the oriental white-backed vulture has declined by 99.9 percent and the numbers of two other highly-endangered species by 97 percent since 1992 in India, a story in the Hindu newspaper said citing a study in the Journal of the Bombay Natural History Society.

印度某媒体在引用孟买自然学会期刊上发表的研究报告时说明，自一九九二年白背秃鹰数量减少了百分之九十九点九，而其他两种几近濒危的秃鹰数量也少了百分之九十七。

The population of white-backed planthopper nymphs showed a clumped distribution mainly after immigrating into rice fields and south-north was the main direction for WBPH nymphs to aggregate and diffuse.

白背飞虱若虫种群的空间分布主要呈聚集分布；在研究尺度下，南北方向是白背飞虱若虫种群聚集和扩散的主要方向。

The monoclonal antibody-based indirect enzyme-linked immunosorbent assay was used to determine the relationships among the detectable time and taken amount of white-backed planthopper Sogattella furcifera in the gut of Pardosa pseudoannulata Boes.et Str.

应用单克隆抗体研究了白背飞虱在拟环纹豹蛛体内的可测定时间与温度和捕食量的关系。

The abundance of insect pests in the KMD plot was higher than that in XS11 plot, because of the higher populations of the white-backed planthopper, Sogatella furcifera and the green rice leafhopper, Nephotettix cincticeps in the KMD plot.

KMD田间害虫亚群落的数量高于XS11田间的，主要由白背飞虱种群数量的上升所引起，此外黑尾叶蝉的种群数量也有上升。

The seasonal pattern of parasitism of the white-backed planthopper, Sogatella furcifera, was investigated in a subtropical double cropping of rice ecosystem in hilly region Jinghua-Quzhou Basin, Zhejiang, China.

在亚热带浙江金衢盆地的丘陵双季水稻田的早、晚稻期间研究了白背飞虱的被寄生和被捕食作用下的存活率。早、晚稻白背飞虱卵被缨小蜂寄生率分别为 1 1 %和 1 6 %，被捕食及未知因子死亡率分别为 2 3%和 1 6 %。

For assessing impacts of Bt rice on the non-target insects, the population parameters of the white-backed planthopper, Sogatella furcifera fed on transgenic cry1Ab rice varieties KMD1 and KMD2 and their parent rice variety XS11 were assayed in the laboratory.

通过室内饲养实验及水稻氨基酸和碳、氮含量测定，比较研究了转cry1Ab水稻克螟稻(KMD1和KMD2)与其亲本秀水11对非靶标害虫白背飞虱种群增长的影响。

To compare the susceptibility of two homogenous genotypes of transgenic indica rice, namely, B1 and B6 expressing a gene of cry1Ab from Bacillus thuringiensis Berliner against the non-target pest, the white-backed planthopper, Sogatella furcifera, with that of their non-transgenic parental cultivar (Jiazao 935), the development duration, oviposition behavior and fecundity of this planthopper on B1 and B6 were measured as compared with those on Jiazao 935 using the methods including a developmental duration measurement, an electronic monitor of the oviposition behavior.

为了比较2个转cry1Ab基因抗虫籼稻品系B1和B6对其非靶标害虫白背飞虱敏感性与其非转基因亲本对照嘉早935的差异，采用历期测定和产卵行为电子记录等方法分别测定了白背飞虱于B1和B6及嘉早935上的发育历期、产卵行为及繁殖力。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。