...,even if there's no scientific evidence a hazard exists.

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• ...,even if there's no scientific evidence a hazard exists.
• 英语翻译This is Scientific American's 60-Second Science.I'm Karen Hopkin.This will just take a minute.If you have a dog,you know you gotta walk it.But do you know how it walks?Well,if you have no idea which foot Fido puts forward when,you’re in good company.Because according to a study published in the journal Current Biology,even places like natural history museums get it wrong half the time.Studies published back in the late 1800s showed that all four-l
• 英语翻译A century and a half of scientific inquiry has yet to solve this one.It's clear that a thin layer of liquid water on top of solid ice causes the slipperiness.A fluid's mobility makes it difficult to walk on,even if the layer is thin.But there's no consenus as to why ice -unlike most other solids-has such a layer.Scientists long reasoned that,since water has the unusual property of being less dense as a solid than as a liquid,its melting point can
• 英语翻译有点长,下面的是这段文章的一部分,Another problem firms face is that those who modify their products due to increased consumer concern must contend with the fact that consumers' perceptions are sometimes not correct.Take for example the McDonald's case where it has replaced its clam shells with plastic coated paper.There is ongoing scientific debate which is more environmentally friendly.Some scientific evidence suggests that when taking a cradle-to-grave approach
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