On March 15th a fire started in the building housing reactor 4, possibly as a result of further hydrogen leaks.

在3月15日，容纳4号反应堆的厂房出现了火灾，很可能导致进一步的氢气泄漏。

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Like deuterium, it is rare relative to helium-4, but, unlike hydrogen, helium doesn't form chemical compounds as abundant as water.

象氘一样，相对于氦- 4它是非常罕见的，但是不同于氢，氦不是来自化学混合物象水那样丰富。

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The wide flammability range, 4% to 74% in air, and the small amount of energy required for ignition necessitate special handling to prevent the inadvertent mixing of hydrogen with air.

在空气中氢的易燃范围很宽，从4%到74%，而且点燃所需的能量很少，必须特别处理，以防止无意中把氢和空气混合在一起。

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Dr. Sen Kim claims to have achieved the separation of Hydrogen using just 0.1kwh of energy compared to the traditional 4 - 4.5kwh required using the ol' electrolytic method.

ENGADGET: Korean tech makes hydrogen up to 30 times cheaper to produce -- clean energy solved?

California regulators voted to mandate major automakers substantially increase the numbers of electric, plug-in hybrid and hydrogen fuel cell-powered models in their fleets in the coming years, eventually accounting for 15.4 percent of all vehicles sold in the state by 2025.

FORBES: California Orders Automakers To Sell More Plug-In and Fuel-Cell Cars