trial fire

例句：

1. 1. The engineers conducted a trial fire to evaluate the new system's performance.
   工程师们进行了一次试验火，以评估新系统的性能。
2. 2. Before launching the new product, they conducted a trial fire to identify any potential issues.
   在推出新产品之前，他们进行了一次试验火，以识别任何潜在的问题。
3. 3. During the trial fire, the team noticed that the system was not functioning as expected.
   在试验火期间，团队注意到系统没有按预期运行。