On the weekend, they mixed sawdust and newspapers with polymers and cement in an unsuccessful attempt to seal a crack in a concrete pit at reactor No 2.

周末的时候，他们尝试着将木屑和报纸与水泥混合堵住第二核电站的泄露小洞，但失败了。

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In Tanzania, masons will provide a concrete slab to install above a pit latrine for $5.

在坦桑尼亚，石匠们只要5美元就能用混凝土板给你在茅坑上面垒个厕所。

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They then built the sand pit initially with bricks, covered the bricks with concrete and then put small stones into the concrete to keep the natural appearance.

然后就是用砖块做沙坑，为了保持自然形态，在砖头上浇注了混凝土并铺上小石子。

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The operation came a day after workers plugged a highly radioactive water leak from a concrete pit connected to the number two reactor, using sodium silicate - known as ''water glass''.

BBC: Japan quake: Nitrogen pumped into nuclear reactor

He said there was some work being done in the pit by concrete workers at the time, who all escaped safely.

CNN: fire