In this paper the relation between the hole diameter and the pile thickness of the jet on the hole bottom for a jet penetrating or drilling process is theoretically examined.

本文在理论上探讨了射流在侵彻或钻孔过程中，孔径和射流在孔底的堆积厚度之间的关系。

youdao

The paper stated the water inrush model of shearing failure at the karst sink hole bottom in North China coal field and analyzed the water inrush mechanism of the karst sink hole.

从论述华北型煤田岩溶陷落柱顶底部剪切破坏突水模式及判据入手，分析了井下溶陷落柱突水机理。

youdao

One of the first water clocks was a basin with a small hole near the bottom through which the water dripped out.

最早的水钟之一是一个在底部附近有小洞的水盆，水从这个洞里滴出来。

youdao

Instead, cut a hole in the bottom of the pumpkin for your candle or other light source.

CNN: Carving up a spooky Halloween

Adventurous travellers can swim under the waterfall via a natural swimming hole at the bottom of the falls.

BBC: Kauai��s hidden adventures

Productivity is still delivering an increased standard of living, albeit with big gaps in who gets the benefits and a large hole at the bottom.

FORBES: Sunday Times Offers Food For Thought On Gas, Capital And Unions