a.

1. 永久的，永恒的；无穷的
   The eternal motion of the stars fascinated him.

   星体永恒的运行使他着迷。

2. 永存的，不朽的
3. 【口】（闲谈等）无休止的
   I couldn't stand their eternal quarrelling.

   我不能忍受他们争吵不休。

adj.

1. lasting or existing forever.
   ▸informal tediously lengthy or persistent.
2. valid for all time; essentially unchanging:
   eternal truths.
3. (the Eternal) an everlasting or universal spirit, as represented by God.