tune up

名词 tune up:

1. exercising in preparation for strenuous activity
   同义词：warm-up, tune-up, prolusion
2. adjustments made to an engine to improve its performance
   同义词：tune-up

动词 tune up:

1. adjust for (better) functioning
   同义词：tune
2. adjust the pitches of (musical instruments)
   同义词：tune

1. The orchestra were tuning up as we entered the hall.
   我们进入大厅时，管弦乐队正在调音。
2. Before he began to play, Harry tuned up his banjo.
   开始演奏前，哈利先行调好他的五弦琴。