Because the Mars probe can encounter a time window in 26 months, experts are closely working on the project plan and try to launch the first Mars probe in 2020.
因为火星探测要26个月才能遇到一个时间窗口，所以专家们正在严密地制定工程计划，争取在2020年这个窗口发射我国第一个火星探测器。