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老外评我国长征二号丁火箭成功发射试验20号C星用于空间环境监测
老外看我国在酒泉卫星发射中心使用长征二号丁运载火箭成功发射试验二十号C星，该卫星主要用于空间环境监测等新技术在轨验证试验。此次任务是长征系列运载火箭的第445次飞行。外国网友的评论翻译
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