由于苯酚对人体有刺激性作用，它基本上已不再被当作常用的防腐剂了。
Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
由于杏仁核对我们的感觉有至关重要的作用，这一发现或许可以解释为什么很多人认为这些画作如此生动。
Since the amygdala plays a crucial role in our feelings, that finding might explain why many people find these pieces so moving.
由于其中可能涉及复杂的物种相互作用，通过移除一个关键物种并观察生态系统的变化来确定该物种是有问题的。
Because complex species interactions may be involved, identifying a keystone species by removing the species and observing changes in the ecosystem is problematic.
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