field trial
noun /ˈfiːld traɪəl/
  /ˈfiːld traɪəl/
(also field test)
- a test of something, such as a piece of equipment, in the place where it will be used现场试验:在将要使用的地方对某种东西(例如一件设备)进行的测试 - Laboratory and field trials have been conducted.已经进行了实验室和现场试验。 
 
- Laboratory and field trials have been conducted.