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TIAN Rong-xiang WENG Huan-xin 《浙江大学学报(A卷英文版)》2006,7(11):1923-1927
INTRODUCTION Global warming is a critical environment prob- lem, and has long been a subject of concern for sci- entists, policy-makers, and many citizens. Increased interest in global warming stems from its potentially disastrous consequences to ecosystems on earth, which may give rise to anomalous regional drought, more frequent and severe floods, intensification of storm, hurricane and typhoon, etc. Concern about mankind’s negative impact on global environmental changes gave rise to th… 相似文献
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世界上约有20种企鹅,全部分布在南半球,以南极大陆为中心,北至非洲南端、南美洲和大洋洲。南极企鹅有7种,分别是帝企鹅、阿德利企鹅、金图企鹅、帽带企鹅、王企鹅、喜石企鹅和浮华企鹅,它们分别属于企鹅科中的3个属。南极企鹅的种类虽不多,但其数量相当可观,约1.2亿只,占世界企鹅总数的87%。下面从分类、分布、形态特征和繁殖等方面对7种南极企鹅作简要介绍。 相似文献
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《中国科学院院刊(英文版)》2009,23(1):20-20
Studies by astronomers from the CAS Purple Mountain Observatory (PMO) haveoffered solid evidence that Sayh al Uhaymir 300 (SaU 300), a lunar meteorite discovered in 2004 from the Oman desert, was originated from the far side of the Moon, the lunar hemisphere that is permanently turned away from the Earth. 相似文献