名词
中文翻译：试验坑
同义词：
['test pit', 'test pits', 'trial pits']
例句：
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1.The engineers conducted a series of trials to improve the efficiency of the machine.
工程师们进行了一系列的试验来提高机器的效率。
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2.The company has been testing its new product in various trial pits around the world.
该公司一直在世界各地测试其新产品。
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3. The scientists conducted a trial pit experiment to determine the effectiveness of their new treatment.
科学家们进行了一个试验坑实验，以确定他们的新治疗方法的有效性。