但是，任何利用安慰剂效应的企图，立即会碰到一个棘手的道德上和实际上的难题。
But any attempt to harness the placebo effect immediately runs into thorny ethical and practical dilemmas.
警告！严禁模仿！如果液态氮浸湿了你的衣服，你就不会被莱顿·弗罗斯特效应庇佑了。你会立即被冻伤。
Do not try this. If liquid nitrogen soaks into your clothes, you will not be protected by the Leidenfrost effect, and you can get frostbite very quickly.
如果液态氮浸湿了你的衣服，你就不会被莱顿·弗罗斯特效应庇佑了。你会立即被冻伤。
If liquid nitrogen soaks into your clothes, you will not be protected by the Leidenfrost effect, and you can get frostbite very quickly.
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