对于大型的空间望远镜，由于发射和在轨工作环境复杂，且常要求在多波段下工作，从而使得在轨自动调焦成为必不可少的一项关键技术。
Because of the complicated launch and on-orbital working condition, and working with multiband, AF technology is a key technology for large space telescopes.
对于大型的空间望远镜，由于发射和在轨工作环境复杂，且常要求在多波段下工作，从而使得在轨自动调焦成为必不可少的一项关键技术。
Because of the complicated launch and on-orbital working condition, and working with multiband, AF technology is a key technology for large space telescopes.
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