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Cesium 137 is a much bigger worry .

铯137的问题则更大。

Radioactive cesium was detected in broccoli in fukushima prefecture well above the country 's limit .

放射性铯元素在福岛的花椰菜中被发现，大大超出国家限制范围。

Shellfish live on the sea floor , accumulating and concentrating the cesium in their bodies .

贝类生活在海床上，其体内会积聚和集中大量的铯。

Now we fix our rulers to the speed of light and our clocks to a spectral property of cesium .

如今，我们通过光速确定尺子的刻度、通过铯元素的一项谱性质确定时钟的刻度。

Additionally , some areas near the crippled power plant , saw relatively large doses of radioactive cesium deposited on the ground .

此外，在严重受损的核电站的附近部分区域，地表沉积的放射性铯的含量相对较高。