By 1700 the Virginia frontier had been pushed as far west as the fall line-the point upstream at which the rivers emptying into the Atlantic became unnavigable.
到了1700年，弗吉尼亚州的边境已经向西远推到了瀑布线——上游河流倾泻于大西洋从而不能通航的点。
Soft Focus: Focusing down the fall line with out spot fixation.
软焦点：注意力放在滚落线上，而不是固定的一点。
Normally, a good turn is started above the fall line with close to 90% of the weight on the outside ski as demonstrated here by the author.
通常，一个好的转弯在入弯的时候90%的力量都是放在外侧板上，就像下图中作者演示的那样。
Pulling Down the Hill: The pole swing should be early. It is a sensation of being pulled down the fall line with the pole plants.
拉下山：雪杖的摆动要及早。要有一种被点杖拉下滚落线的感觉。
Combination of a cross movement, early edge set and pressure in the fall-line with early release are used to produce acceleration in Slalom and GS turns.
穿越动作、提早用刃以及在滚落线处提早释放压力相结合，可以在大小回转中提高速度。
Combination of a cross movement, early edge set and pressure in the fall-line with early release are used to produce acceleration in Slalom and GS turns.
穿越动作、提早用刃以及在滚落线处提早释放压力相结合，可以在大小回转中提高速度。
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