鞭擗进里

Explanation: Means in-depth analysis, so close to the innermost layer. Describe the search for a thorough, in-depth microscopic. With the "whip past in the provision of 　　Source: Guo, "Literary Essays of rhythm": "Thirdly, the hypothesis of physiological ... ... this hypothesis, is the heart and lungs breathing, encouraged that the pace of origin. It felt that he could whip into the inside of Pi."