为了防止匆匆了事，建议用唱两遍“生日快乐”的时间来洗他们的手。
To prevent rushing, suggest washing their hands for as long as it takes to sing the "Happy Birthday" song twice.
建议洗时先用手试试，如果手觉得烫，身体其他部位也会觉得烫。
Recommended when washing their hands first, try, if hands feel hot, other parts of the body will feel hot.
你扔块石头就不可避免地击中一堆有关如何拯救地球的建议，可是这些建议很少有确凿的数据可以说明手洗盘子就能拯救北极熊。
You can't cast a stone without hitting a list of tips to save the planet, but few of them come with any hard data on how hand-washing your dishes will save polar bears.
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