The United States has set plans to return to the Moon by 2018 and later head to Mars, but without setting a date.

美国已经制定了在2018年之前返回月球，然后再前往的计划。

youdao

The United States has set plans to return to the Moon by 2018 and later head to Mars, but without setting a date.

美国已经制定了在2018年之前返回月球，然后再前往的计划。

youdao