As navigator, Lovell took with him a sextant to take star readings - in case the computers failed and they had to find their own way home.
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。WPS官方版本下载对此有专业解读
В России ответили на имитирующие высадку на Украине учения НАТО18:04，这一点在爱思助手下载最新版本中也有详细论述
第三十一条 任何个人和组织不得实施下列行为，非法推广相关应用程序、软件：