You can make a mess but you're not gonna have a major release of radioactivity.

你不能弄混，因为你不会得到，一个反应力的大释放。

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We're hoping that all of the barriers to release of radioactivity will not fail.

我们希望所有防止辐射泄漏的屏障不要失败。

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In other words, cool the core down, prevent a release of radioactivity either directly or indirectly.

换句话说，将核心冷却下来，防止反应力直接或者，间接的释放。

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The resulting release of radioactivity forced residents of several towns near the plant to flee their homes, and a 20-kilometer (12.4-mile) zone around the plant remains closed to the public.

CNN: Obama affirms strong economic, security ties with Japan

The six-reactor Fukushima Daiichi nuclear plant was badly damaged after the 11 March 2011 earthquake and tsunami knocked out cooling systems to reactors, leading to meltdowns and the release of radioactivity.

BBC: Japan panel: Fukushima nuclear disaster 'man-made'