test trial

例句：

1. 1.They conducted a rigorous test of the new product before releasing it to the market.
   他们在将新产品推向市场之前，对该产品进行了严格的测试。
2. 2. The company is conducting a trial run of its new software system.
   该公司正在对其新软件系统进行试运行。
3. 3.The scientist conducted several tests to determine the effectiveness of the new treatment.
   科学家进行了几次测试，以确定新治疗的有效性。