In a boiling water reactor like those at Fukushima, the same water that cools the reactor core also boils and drives the turbine to generate power.

在像福岛核电厂的沸水反应堆中，冷却反应堆芯的水还拿来煮沸，以此推动涡轮机旋转从而产生电量。

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The sea water appears to have been brought in as a substitute for the regular water used as coolant for the uranium fuel rods at the heart of the reactor.

海水是作为普通水的替代品而引入的，普通水是反应堆核心铀燃料棒的冷却剂。

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This greatly increased the amount of water available to soak up the heat, and should have made sure that the reactor was fully covered by water and thus not hot enough to damage itself any further.

此举是增加水量来吸收热量，并要确保反应堆完全被水覆盖，这样高温就不会进一步损坏反应堆。

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There are a number of different reactors in use, most commonly water-cooled pressurised or boiling water reactors - though other reactor types are kept cool with the help of liquid metal, gas or molten salt.

BBC: Will Japanese crisis curb the rise of nuclear power?

Iran, by comparison, is producing near-weapons-grade uranium, but it also has a heavy-water reactor being developed that could produce weapons-usable plutonium.

WSJ: U.S. Opposes Japan's Nuclear Plan

Iran is also building a heavy-water reactor that could produce plutonium, another bomb ingredient.

ECONOMIST: The Europeans' soft approach to Iran seems to have failed