即使在最有利的环境中，死去的生物也只有一小部分在开始腐烂前，或更有可能在被食腐动物吃掉之前，被这样保存下来。
But even in the most favourable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.
即使是在最有利的环境中，死去的生物中也只有一小部分能在开始腐烂前，或更可能在被食腐动物吃掉之前，被这样保存下来。
But even in the most favourable circumstances, only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.
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