生态学者

PartⅡ: The author has analyzed the achievements studied in coastal zone tourism development by the domestic and international scholars in an all-round way, appraised the contributions and scarcities, pointed out the problems should be study further still in the future.

第二部分，全面分析了国内外学者有关海岸带生态旅游的研究成果，评述了已有研究中的贡献和不足，指出了今后尚需进一步研究的问题。

Chinese researchers have done a lot of work on researching and protecting the black-necked cranes since 1980. This paper reviews the distribution, population ecology, habitat status and protecting situation of the black-necked cranes in Tibet, some suggestions are proposed for further protection in the future.

本文记述了20世纪80年代以来我国学者对分布在西藏的黑颈鹤研究和保护的成果及其进展；包括黑颈鹤在西藏的地理分布、种群生态、生境现状以及保护管理现状；并对目前黑颈鹤保护所面临的问题提出了相应的建议。

Sand hair goat breeding has a long history, is a long-term specific local ecological environment, natural selection and artificial selection under the influence of the formation of the joint. In l951, as local sand wool fur products on display in Beijing, has aroused attention of the relevant experts and scholars and, through investigation and research in the areas, known as the Zhongwei goat fur. In the early 50 international markets in Europe, some experts have caused surprise and appreciation.

沙毛山羊养殖已有悠久的历史，是长期在当地特定的生态环境中，自然选择和人工选择共同影响下形成的。l951年沙毛裘皮作为地方特产在北京展出时，引起了有关专家学者的注视，并通过在产区调查研究，定名为中卫裘皮山羊。50年代初期在欧洲国际市场出现，也曾引起一些专家的惊奇与赞赏。

Nowadays the research on ecological environment of nonionic surfactants hasbecome a focus at home and abroad.

目前，非离子表面活性剂对生态环境的影响已成为国内外学者研究的热点。

Initially, it had been an experiment conducted by biochemists. They wanted to use asexual reproduction to control the ecosystem of the fly.

最初本是生化学者的一种实验，想以无性生殖控制苍蝇的生态。

U.S. Global ocean ecosystems dynamics is a component of the U.S. Global Change Research Program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

&美国全球海洋生态系统动力学研究计划&由海洋学者、渔业专家组成，是&美国全球变化研究计划&的一部分，主要研究全球气候变化对海洋生物的丰度和生产量的影响。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。