Clearing a forest , draining a wetland , damming a river or dynamiting a coral reef to kill its fish can more readily eliminate species with small ranges than more widespread species 分布?围小的物种跟?围大的物种比起来，更容易因森林砍伐、湿地乾涸、河流筑坝或珊瑚礁炸鱼等原因而绝灭。
If it is god s justice , instead of his anger , which is walking through that house , maximilian , turn away your face and let his justice accomplish its purpose . " morrel shuddered 假如来到那座房子的不是上帝的绝灭天使而是他的正义之神，马西米兰，你装作没有听见这一切，让正义之神去行动吧。 ”
Modern birds are the only group of mesozoic birds to have survived after the k / t extinction event , and recent ornithurine discoveries lend further support to the cenozoic origin of the modern avian groups 现生鸟类是白垩纪与第三纪之交绝灭事件发生之后的幸存类群，近来今鸟类的新发现也进一步支持了现生鸟类起源于新生代的推论。
Sufficient conditions for the global attractivity of boundary equilibrium are obtained via fluctuation lemma , and sufficient conditions for uniform persistence of this model are obtained via uniform persistence of infinite dimensional systems 然后利用无穷维动力系统一致持续生存的理论给出了该系统一致持续生存和绝灭的充分条件。
A warmer climate could lead to rising sea levels , the spread of tropical diseases in previously temperate climes , crop failures in some regions and the extinction of many plant and animal species , especially those in polar or alpine areas 变暖的气温使海平面上升、热带疾病在温带传播、一些区域的农作物歉收以及许多动植物物种绝灭，特别是两极与高山地区的生物。
Forget nuclear warheads to stop a crash with a comet that could have cataclysmic effects such as the one that is believed to have triggered the demise of the dinosaurs , hermann burchard of oklahoma state university told new scientist magazine 俄克拉荷马州立大学的赫尔曼-伯恰德对新科学家杂志说，别想用核弹头去阻止同彗星的碰撞，那样做的后果会跟据信使恐龙绝灭的那次灾难差不多。
In complementary case , sufficient conditions for uniform persistence and extinction of the population are obtained by the theory of uniform persistence of infinite dimensional dynamical systems . especially for the model with equal diffusion coefficients and zero death rates , the global attractivity of the unique positive steady - state solution is proved . in substitutable case , sufficient conditions for uniform persistence and extinction of population are also ob 首先考虑了具有互补营养的扩散模型，得到了该系统中种群绝灭和一致持续生存的充分条件；并对营养和种群具有相同的扩散系数和种群零死亡率的模型，证明了该系统存在唯一的正平衡解，并证明了该平衡解的全局吸引性。
At the end of late pleitocene , influenced by the climate of glacier period , the last great event of the region in the geological time was taken place so that the migration and extinction of organism species were resulted , loess accumulation was generally developed throughout the whole region , in the holocene , the most important environmental change was fluvial process , which was still influnced by two factors - neotectonics and palaeoclimatic changes 更新世晚期末，受末次冰期气侯的影响，本区发生了地史时期的最后一次大事件，造成了物种迁移和绝灭，全区广泛发育黄土堆积。进入全新世，本区环境变化以河流作用最为显著，沉积物主要分布在各大水系的河谷中，构成一、二级阶地和近代河床与河漫滩堆积。
The experts on the panel have reached this alarming conclusion : human - accountable climate change will lead to more " freak " weather conditions such as cyclones , floods , and droughts ; massive displacement of populations in the most severely affected areas ; potentially enormous loss of human life ; greater risk of diseases such as malaria as the habitat for mosquitoes expands ; and extinction of species such as the bengal tiger , as their habitat is destroyed 但最后讯息仍十分骇人，专家代表们认为人为的气候变迁产生的效应会导致更多旋风旱涝等怪异天灾受害最烈地区居民将大批流离失所人类生命损失将十分庞大蚊蚋会扩大栖息范围，使疟疾等疾病危害的风险加大孟加拉虎等物种将因栖息地遭破坏而绝灭。
