阿波罗型小行星因定期地穿越地球轨道而构对地球的威胁。

Apollo asteroids pose a threat to our planet as they routinely cross Earth's orbit.

youdao

阿波罗型小行星因定期地穿越地球轨道而构对地球的威胁。

Apollo asteroids pose a threat to our planet as they routinely cross Earth's orbit.

youdao