从所处的职位上退下来，不再担任所任的职务to leave one's post

• 他退任后，将做一些研究工作。

  After he leaves his post, he will do some research work.

• 退任后的新作，最能表达他“老骥伏枥，志在千里”的博大胸襟。

  His new book after retirement is a good illustration of how "an old steed in the stable still aspires to gallop a thousand li"