Before we enter into that subject, I wish to request some clarification on a minor point. Do you mind if we take a minute?
我们进入主题之前，我想先询问一个小问题的细节。希望您不介意我们占用一点时间。
2
The research on the mechanism of the landform control over karstification in mud limestone area was the starting point of clarification of karst process.
研究泥灰质岩石区地貌对岩溶的控制机理是弄清岩溶过程的出发点。
3
The research on the mechanism of the landform control over karstification in mud limestone area was the starting point of clarification of karst process.