In the past, according to Mr Green, the surface material has been too lattice-like (and thus dangerous) for proper skiing, but a British engineer has solved this.

格林先生说，以前这种表面材料晶格特征过于明显(因而很危险)而不利于滑雪。但是一个不列颠工程师解决了这个问题。

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However, rare earth is often radioactive. Moreover, in the smelting and extraction of rare earth, dangerous chemicals are frequently used, thus polluting local air, water and land.

但是，稀土生产往往带有放射性，加工企业在冶炼和分离稀土时，也经常使用危险的化学品，周围的空气、水和土地容易遭到污染。

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Polyunsaturated fats, which are typically of vegetable origin, have the opposite effect; thus corn, safflower, soybean and sesame oils tend to lower the level of potentially dangerous LDL.

多元不饱和脂肪主要存在于未加工的蔬菜里，它有着与上相反的功效；像玉米、红花、黄豆和芝麻油都含有较低的LDL。

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The post-Sudafed meth is more refined (rising from 50% purity to 80% since 2006) and thus more addictive and dangerous.

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The idea being that certain financial innovations are potentially dangerous and thus should be examined and approved, just as we do with drugs and medical treatments, before they are deployed into the marketplace.

FORBES: Posner's FDA for Financial Innovation: A Truly Terrible Idea

From which the takeaway point is that perhaps climate sensitivity is lower than currently thought and thus climate change is less dangerous than currently thought.

FORBES: If the MWP Was Global What Does That Tell Us About Climate Change Now?