你觉得我们将人类送上月球只是因为它是一个“好主意”吗？
Do you think we got a man on the moon because it was a just "good idea"?
有时候，我们希望知道原因，只是出于人类原始的好奇心。
In some cases, our desire to know about causes is just raw human curiosity.
没错，我们有时候都能是“自我迷恋”的——只是迷恋人类。
Sure, we can all be "self-obsessed" at times - it's only human.
可不可能这对染色体只是在我们人类的族系中丢失的呢？
Is it possible that a pair of chromosomes just got lost in our lineage?
答案是否定的，社会科学家说：这只是让我们看起来像个人类。
The answer is no, social scientists say: it makes us look like human beings.
在对人类记忆进行的研究方面，我们目前发现的还只是冰山一角。
We understand only the tip of the iceberg when it comes to human memory.
在对人类记忆进行的研究方面，我们目前发现的还只是冰山一角。
We understand only the tip of the iceberg 8 when it comes to human memory.
我们只是处于每一个人类进步活动的最初。
We are just at the beginning of the progress in every field of human endeavor12.
我们只是处于每一个人类进步活动的最初。
We are just at the beginning of the progress in every field of human endeavor12.
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