Tokyo 's tap water , where iodine turned up friday , now has caesium as well .

周五时从东京的自来水中检测到放射性碘，现在出现了放射性铯。

Atomic clocks rely on regular oscillations of caesium atoms to keep time and are extremely accurate .

原子钟依靠铯原子的均匀振动记录时间，故而十分准确。

What is more , caesium particles tend to lurk in the grass , which means radiation is more of a risk at toddler height than for adults .

更近一步说，粒子往往潜伏在草地中，这就说明比起成年人，蹒跚学步的孩子受到辐射影响的风险更大。

But in a setback that delayed the plan by about a week , water leaked on thursday from a facility used to absorb caesium .

但是，因为周四遭遇挫折，水从用来吸收铯的设备中泄露，计划被推迟了约一个星期的。

Japan 's nuclear and industrial safety agencyestimates that the emission of radioactive iodine and caesium from the fukushima plant totals , to date , something equivalent to 370 petabecquerels .

日本原子核中心及工业安全当局，已经估计了到目前为止福岛泄露的铯元素放射的碘总量大约已经达到370居里。