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1. The government is conducting regional preliminary trials to evaluate the effectiveness of the new drug.
政府正在进行区域性初步试验，以评估新药的有效性。
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2. The scientists conducted regional preliminary trials to gather data for their research project.
科学家们进行了区域性初步试验，以收集数据进行他们的研究项目。
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3. The company has launched a regional preliminary trial in several cities to test its new product.
该公司已在几个城市启动了区域性初步试验，以测试其新产品。