An interesting thing is that our brain will release a pleasure-related chemical when it has been given new information, making seeking information much like eating—another pleasant activity.

有趣的是，当我们的大脑得到新信息时，它会释放一种与快乐相关的化学物质，使得寻找信息成为像进食一样的另一种惬意活动。

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I don't mean that it is a pleasant experience, but that disappointment can provide us with valuable information that we can learn from.

问我并不是说这是一次令人愉快的经验，但是失望可以为我们提供一些可学习的有价值的信息。

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Most of you have probably been on projects like these. Whether or not you were the "hero," my guess is that when you reflect on the experience, it isn't a pleasant memory.

你们中大多数可能正处于这样的项目中，不管你是否是那个“英雄”，我想当你回想起这段经历时，都是不愉快的回忆。

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Researchers say the fan could be used to remind people that it is lunch-time by dispensing pleasant smells of fresh bread or pizza.

BBC: 'Smelly' fans remind people to eat

It is only after these two qualities have been compared that the brain assesses how pleasant a mouthful actually is.

ECONOMIST: The evolutionary role of cookery

But it is the once-pleasant downtown that causes most alarm.

ECONOMIST: A great city more troubled than it is cracked up to be