许多物种都是同宗演变而来的。
许多物种都终生配对。
许多物种的早期胚胎具有其祖先的特性。
在许多物种中，这些特征包括侵略性。
In many species, such characteristics include aggressiveness.
许多物种已经消失，例如獭猫。
A number of species have already disappeared, such as the jaguarondi.
许多物种能自然地产生少量的烃类。
许多物种将会永远消失。
许多物种已经从地球上灭绝了。
许多物种都因这一灾祸而发育不良。
有许多物种充满感情的，魅力。
There's a number of species which are charismatic and emotionally charged.
第四纪冰期，使许多物种绝灭。
许多物种已在地球上绝迹了。
海龟、乌龟、青蛙和蛇这许多物种的悲剧又一次上演了。
It is a similar story for many species of turtle, tortoise, frog and snake.
结果，许多物种消亡了。
许多物种正濒临绝种。
净化涉及了许多物种。
如果我们不采取行动，许多物种将很快灭绝。
这里有许多环境类型和许多物种，非常丰富。
There are many kinds of environments here and many kinds of species.
根据主题'许多物种。
这意味着，这里的许多物种可能会在被发现之前就消失了。
This means that many of these species could have disappeared before even being discovered.
许多物种濒临灭绝。
长期以来，许多物种希望相信自己能超越伤害。
For a long time, many species wished to believe itself beyond harm.
但是，人类在挽救许多物种方面仍面临种种困难。
But many species cannot be easily saved by human intervention.
这些波动更增加其他许多物种幸存的不确定的程度。
These fluctuations add yet another degree of uncertainty to the survival of many species.
对许多物种来说，染色体数目是重要的分类学特征。
For many species, chromosome number is a useful taxonomic character.
许多物种已经被逼入绝境，更多的如今踉跄在生死之间。
Many have been driven to extinction, and many more now teeter on the brink.
但是，据研究人员表示，许多物种甚至会在发现之前就已灭绝。
But many of them will disappear before they are even found, according to the researchers.
有许多特征使这一物种与其他物种区别开来。
有许多特征使这一物种与其他物种区别开来。
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