... focus 焦点 focus rays 集聚射线 focused beam laser 聚焦束激光器 ...
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... focus 焦点 focus rays 会聚射线 focused beam laser 聚焦束激光器 ...
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focus the sun's rays on 使阳光聚焦于
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And that depends on being able to see the lower-energy radiation, in order to pinpoint what it was that exploded (gamma rays are impossible to focus, so the location of a burst is known only approximately).
ECONOMIST: Astronomy
Nustar is unprecedented in its ability to focus in on distant parts of the cosmos in these high-energy X-rays.
BBC: First glimpse of a black hole's spin
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