test batch

例句：

1. 1.The engineers conducted a test batch of the new machine before releasing it to the market.
   工程师在将新机器推向市场之前，进行了一次试验批次。
2. 2. Before launching the product, the company tested a batch of samples for quality control.
   在推出产品之前，公司对一批样品进行了质量控制测试。
3. 3.The manufacturer decided to test a batch of new materials before mass production.
   制造商决定在大规模生产之前测试一批新材料。