资料来源 : pyDict

报名,签约受雇

资料来源 : WordNet®

sign up
     v 1: engage by written agreement; "They signed two new pitchers
          for the next season" [syn: {sign}, {contract}, {sign on}]
     2: join a club, an activity, etc. with the intention to join or
        participate, "Sign up for yoga classes"