to drift out

Water is thought to be crucial for life because it provides a medium for nutrients to diffuse into cells and wastes to drift out, and a solvent for critical metabolic reactions.

水被认为对生命是至关重要的，因为水是营养物渗入细胞以及废物排出的媒介，也是关键新陈代谢反应的溶剂。

That's important because consumers are likely to drift away if conversations Peter out or if they feel that their voices are lost in a chaotic flood of comments.

这很重要，因为如果对话逐步消退，或者消费者感到他们的声音消失于汹涌杂乱的评论潮中，他们很可能渐渐离去。

That does not rule out a gradual drift to infertility as an additional explanation, but makes it possible that infertility is a consequence, rather than a cause of speciation.

这并没有排除向不孕缓慢转变的这种补充解释，但可能的是，不孕是物种形成的结果，而非原因。