We might marvel at the progress made in every field of study, but the methods of testing a person's knowledge and ability remain as primitive as ever they were.

对各个学科所取得的进步我们或许会感到吃惊，但是测试人们知识和能力的方法仍像过去一样原始。

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We might marvel at the progress made in every field of study, but the methods of testing a person's knowledge and ability remain as primitive as ever they were.

我们可能会惊叹于每一个学习领域所取得的进步，但是，测试一个人的知识和能力的方法仍然和以往一样原始。

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This paper focuses on the study of its operation procedures, tools used, and drilling fluid technology, etc. The laboratory testing, study achievements, and field applications are also described.

文中重点论述了延迟固井技术在工艺、工具、水泥浆等方面的研究情况，并介绍了室内试验、研究成果和现场应用情况。

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