exertion的词根（tradition的词根记忆）

词缀ex+词根ert+词缀ion，中文意思是n. 费力，努力；运用，行使

Climbing further, with renewed courage, he at last saw his goal before him, but not without long and weary exertion.他又重新鼓起勇气，继续往上爬，他终于看到了眼前的目标，但还需要经过漫长而疲惫的努力才能到达。