求翻译：3. Even now, the effort to contain the Chernobyl accident is far from over: workers in white suits and respirator masks show up for work every day, constructing a new concrete shield to replace a massive sarcophagus built in 1986. The sarcophagus, which contains the molten core, is starting to crumble and could collapse, which could release another radioactive cloud into the air.是什么意思？

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