• This week there were two big developments in astronomic science.

    周天文学界两个进展

    youdao

  • Please do not be panic, because this is a normal astronomic phenomenon on the earth.

    遇到日食,不要惊慌只是正常天文现象

    youdao

  • Please do not be panic, because this is a normal astronomic phenomenon on the earth.

    遇到日食,不要惊慌只是正常天文现象

    youdao

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