Responsive mechanism of species extinction to the habitat destruction at different time scales;
物种灭绝对不同时间尺度人类活动的响应机制研究
However,the speed of species extinction is gradually accelerating as human being came to dominance.
地球出现生命以来,生物物种数量动态增长,但随着人类活动的出现,生物物种灭绝速度逐渐加快。
It is indicated that the species extinction is speeding, the endangered species are increasing.
本文探讨了生态系统和物种多样性所面临的威胁，指出目前物种灭绝的速度在加快，濒危物种在增多，生物多样性保护的重点应是濒危物种。
The species extinction is popular in nature,and extinctive factors are varions.
物种绝灭现象在自然界是普遍存在的 ,绝灭因素是多种多样的 ,绝灭和进化是生物发展史上的两个重要方面。
One of the signatories, the Soviet Union, no longer exists.
其中的一个缔约国苏联已不复存在。
The old German Empire ceased to exist in 1918.
到一九一八年，旧德意志帝国不复存在。
The ancient city Troy is no more.
古特洛伊城已不复存在了。
The urgent need for defence had also vanished.
防护的应急需要也不复存在了。
a British peer whose title lapses at death.
死后头衔不复存在的英国贵族。
Many old customs have died out.
许多旧的风俗已不复存在。
The art of good conversation seems lost.
高雅谈吐的艺术似已不复存在.
and the piding line between childhood and adulthood ceases to exist.
孩童期和成人期的界线不复存在了。
Does this mean, however, that self-control is lost?
然而，这是否意味着自我控制不复存在?
Research is our driving force.
变革将不复存在，进步将只是空想。
The old German Empire ceased to exist in 1 9 1 8 .
到１９１８年，旧德意志帝国不复存在。
This custom ad died out by the end of the 12th century.
到十二世纪末这一风俗已不复存在了。
no longer existing or inaccessible through loss or destruction.
因为遗失或者毁灭而不复存在、不能再得到。
Everybody else could grow shadowy, almost non-existent to him.
在他眼中其他人都可能变成幻影，几乎不复存在。
The custom of young ladies being presented at court has disappeared.
年轻女子被举荐入宫的风俗已不复存在.
For the coal and steel industries at least, frontiers ceased to exist.
至少就煤炭钢铁工业而言，边界不复存在。
Many of the barriers that stopped cross-border commerce have fallen.
很多阻碍跨国商贸活动的壁垒已经不复存在。
Folder to move/copy to does not exist
不存在您所要移动或复制的文件夹