But in fact, we know very little about the effects of breastfeeding at long durations, because so few women breastfeed for more than a few weeks.
但实际上，在很长一段时间内我们对母乳喂养的影响知之甚少，因为很少有母亲用母乳喂养超过几周的。
Sleep and dreams have interested people for centuries. Scientists are learning more about sleep, but they still know very little about why we dream.
几个世纪以来，睡觉和做梦都让人着迷。科学家对于睡觉了解了很多，但是他们仍然不清楚为什么人会做梦。
What do we know about the curious, secretive NSO Group? Very little - but after this week, an awful lot more than we did before.
关于这个令人好奇的、神秘的NSO组织我们所知多少？很少、但这个星期，我们却挖掘出了更多关于该组织可怕的一面。
Read more and unthinking, you will feel you know a lot about it; but when you read and think more, you will clearly see you know very little. — Voltaire.
书读的越多而不加思索，你就会觉得你知道得很多；但当你读书而思考越多的时候，你就会清楚地看到你知道得很少。——伏尔泰。
Read more and unthinking, you will feel you know a lot about it; but when you read and think more, you will clearly see you know very little. — Voltaire.
书读的越多而不加思索，你就会觉得你知道得很多；但当你读书而思考越多的时候，你就会清楚地看到你知道得很少。——伏尔泰。
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