What time is it? The answer you give can be different, because you are in different Earth's time zones. But how could you tell the time if you aren't anywhere on Earth?
几点了？你给出的答案可能不同，因为你处于地球的不同时区。但是，如果你不在地球上，你怎么能知道时间呢？
Scientists are now thinking of creating a lunar time zone. They believe it would be better for astronauts to communicate by using Moon Time, as they travel to, from, and across the Moon. At the moment, astronauts are using time zones of their own countries. But there could be safety problems caused by the differences in time-telling.
科学家们现在正在考虑创建一个月球时区。他们认为，宇航员在往返月球和穿越月球时，使用月球时间进行交流会更好。目前，宇航员正在使用自己国家的时区。但时间差异可能会导致安全问题。
Setting up a lunar time zone is not easy. Gravity influences how quickly or slowly time passes. Since gravity is weaker on the Moon, clocks run a bit faster there. After 24 hours, a lunar clock would be 56 microseconds ahead of a clock on Earth. Another point to consider is that a full day on Earth is about 24 hours between two sunsets. While on the Moon, it is nearly 709 hours, about 29.5 Earth days. This means that lunar nights can be around two weeks long, with only the Earth and the stars in the sky. With all this to think about, scientists need to decide whether it would be better to follow a time zone on Earth, or for the Moon to have its own special zone, which would have much longer days.
建立月球时区并不容易。重力影响时间流逝的速度。由于月球上的引力较弱，时钟在那里运行得更快。24小时后，月球时钟将比地球上的时钟快56微秒。另一个需要考虑的问题是，地球上一整天大约是两次日落之间的24小时。在月球上，它将近709小时，大约29.5个地球日。这意味着月球的夜晚可能长达两周左右，天空中只有地球和星星。考虑到这一切，科学家们需要决定是遵循地球上的时区更好，还是让月球有自己的特定时区，这将有更长的时间。
Scientists must consider other problems too. For example, who should be responsible for keeping the time zone going? And how can it be made practical for astronauts to use?
科学家们还必须考虑其他问题。例如，谁负责保持时区运行？如何使宇航员能够实际使用？
There are more countries planning Moon trips in the future. The idea of creating a time zone on the Moon would make these easier. And if a lunar time zone is set up, scientists could create time zones for other planets like Mars.
未来有更多的国家计划登月。在月球上创建一个时区的想法将使这些变得更容易。如果建立了月球时区，科学家们可以为火星等其他行星创建时区。
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