Police had to delicately comb through the keepsakes, since many of the items were damaged, after being soaked in seawater and mud for days or weeks.
警员们必须仔细的梳理这些纪念品，因为在海水里浸泡了几天甚至几个星期后，很多物品都已经损坏。
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Abnormally high levels of radioactive substances have been detected in seawater near the Fukushima nuclear power plant in Japan, which was damaged by an earthquake and tsunami 10 days ago.
Ship, seawater pipe and cooling system of offshore platform both faced the problem of being polluted and damaged by marine organism. What's worse, it may clog pipe and stop production.