欧内斯特·布拉奇利是普渡大学的工程学教授，他从印第安纳州的西拉斐特打电话过来。
Ernest Blatchley is a professor of engineering at Purdue University, and he joins us by phone from West Lafayette, Indiana.
欧内斯特·布拉奇利是普渡大学的工程学教授，他从印第安纳州的西拉斐特打电话过来。
Ernest Blatchley is a professor of engineering at Purdue University, and he joins us by phone from West Lafayette, Indiana.
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