但如果有人说他可以在地球上看到月球上的陨石坑，你肯定不同意，因为还没那么清楚到足以看的出来是陨石坑。
But if someone said, you can see the craters on the moon from earth, would you disagree, because it is not clearly visible as such?
如果你看周期表的下面部分,到109号，你会看到这些奇怪的符号,这些是什么呢？
If you do look down at the Periodic Table and get above 109, Uun Uuu Uub you will see these strange notations here, Uun,Uuu,Uub What is all of this?
如果你长期地看，很明显它会随你从，这一点到那一点变化。
If you look at a long term, obviously it's going to change as you go from this point to that point.
现在我就可以给看你，如果你愿意看的话。到目前止，我认为它可以追溯到8代人。
I can show it to you now, if you like. I think it goes back about 8 generations so far.
如果你觉得不够热的话，可以穿过盐湖，到Dallol火山——世界最低的火山去看一看。
Head across the salt plain to the Dallol volcano, the lowest on earth, if that's not hot enough for you.
如果你下周回过头看，意识到另一个人占了先机，你的感觉可不会太好。
You'll feel bad if you look back next week and realise the other person concerned was allowed twin.
如果你下周回过头看，意识到另一个人占了先机，你的感觉可不会太好。
You'll feel bad if you look back next week and realise the other person concerned was allowed twin.
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