test for field of vision of driver cab

例句：

1. 1. The engineer tested the new machine before it was put into use.
   工程师在机器投入使用前对其进行了测试。
2. 2. The scientist conducted a thorough test of the new drug.
   科学家对新药进行了彻底的测试。
3. 3. The company insisted on conducting a rigorous test before releasing the product.
   公司坚持在产品投放市场前进行严格的测试。