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When light is focused even more as a laser beam, it can cut through steel.
当光被集中成为雷射线时，连钢铁都能穿透切断。
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Laser beam can be focused on a very tiny spot.
激光光束可以聚集到一个很小的小点上。
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Laser beam can be focused on a very tiny spot.
激光光束可以聚集到一个很小的小点上。
youdao