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It's not going to be a backscatter event if your ping-pong ball hits the frame or these strings, or the top part.
打到原子核了就是背散射,如果打到框上。
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I started out playing T-ball which is, there's no pitcher.
我一开始打的是简易棒球，是没有投手的那种。
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So, it'll be considered a backscatter event if your ping-pong ball hits one of the nuclei.
什么情况是背散射,如果你们的乒乓球。
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What does it feel like to be the machine while it's looking at-- while it's got its little light sensors pointed at--the red ball?
当机器以电子眼,对着那个红色的球,它会有什么样的感觉
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He has a little ball. A little two- or three-year-old kid has a ball.
他有一个小球，一个两或三岁的孩子有一个球。
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The average speaker knows, as a low-ball estimate, about 60,000 words.
保守估计,说话者平均知道大约六万个词
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There are three ways, the goal--the attacker could kick the ball.
罚球队员可以选择三种不同射门路径
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You have a tube, a transparent--a tube--a hollow tube, and at the top of the tube you throw a ball through so it whips through the tube and it comes out.
用一根管子,一根透明中空的管子,从管子最上面,你丢进去一个小球,小球迅速穿过管子,飞出来
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Raise your hand if you don't if you don't have a ping-pong ball yet.
这样就可以算,背散射的概率了。
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