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他们让粒子落在荧光屏上以观察他们的偏移。
They observed the deflections of the particles by allowing them to fall on a fluorescent screen.
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他们观察到雷达荧光屏上出现一架飞机。
They observed an airplane appear on the screen of radar.
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他们观察到雷达荧光屏上出现一架飞机。
They observed an airplane appear on the screen of radar.
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