Eun
n. (Eun)人名；(柬)恩\\nabbr. 内源性尿氮（endogenous urinary nitrogen）
🗣️ 情景例句
She took a medical course.
她选读医学课程。
A plant may produce new flowers; man is young but once.
花有重开日，人无再少年。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，