cover ground

phr

• ①[通常ground之前附有much, a lot of等]走(某段距离);旅行
  • He covered a lot of ground that day.他当天走了许多路。

• ②[通常ground之前附有much, a lot of等](演讲、演讲者、报告、报告者等)涉及某范围
  • The book covers a good deal of new ground.那本书涉及许多新范围。