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English

In optical microscopes this problem is solved by using a combination of concave and convex lenses to correct the aberration, but this requires a stability which seemed difficult to achieve in large, ultra-high-voltage electron microscopes.

Chinese

一般而言,光学显微镜会结合凸透镜与凹透镜来进行矫正,但由于需要实现显微镜本身的稳定性,一般被认为难以装载于大型超高压电子显微镜。