The invasion process is complex. It is generally considered to start with a short initial spurt loss when the bit penetrates the rock.

侵入过程复杂，通常认为当钻头穿透岩石时，随着一个短期的初触失水而开始侵入过程。

youdao

The Soviet Union, after an initial spurt of industrialization, was a model of economic failure.

NEWYORKER: After America

That initial spurt of pressure saw Liverpool win a corner with Maxi Rodriguez heading the ball to Torres, but the Spanish striker's volley struck the post.

BBC: Wigan 1-0 Liverpool

In this article, I will concentrate on the more pronounced retracements, but one should note that after the initial upside spurt in HES, it dropped back to the minor 61.8% support.

FORBES: Finding High-Probability Entry Levels