The Japanese have reported that some of the seawater used for cooling has returned to the ocean, suggesting that some of the salt may have flowed out again.
日本已经报道称部分用于冷却的海水已经流入了海洋，表明部分盐可能已经重新流回去了。
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Thermal distillation involves heat: Boiling water turns it into vapor-leaving the salt behind-that is collected and condensed back into water by cooling it down.
热蒸馏涉及到加热：沸腾的水变成水蒸气- - -盐分留了下来- - -被收集的蒸汽冷却后凝结成水。
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Some of the salt may have been washed away in the past week with the switch from seawater to fresh water cooling, nuclear experts said.