There is always an unstable region or break in the static pressure curve of a propeller fan.

在螺旋桨式风机的静压曲线中存在着不稳定区域或断点。

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Meanwhile, the decrease of back muscles strength and unbalance of body muscles strength in degenerative spondylolisthesis patients induced abnormal lumbar curve to break down lumbar stability.

同时，退行性腰椎滑脱患者腰背肌肌力下降，躯干肌肌力失衡导致腰椎曲度变化，进一步影响腰椎稳定性。

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Look for a break point in the cumulative percentage line. This point occurs where the slope of the line begins to flatten out. The factors under the steepest part of the curve are the most important.

在加全平均曲线上发现转折的地方，该点应该是曲线的斜坡转为平坦的地方。曲线最陡峭的部分相关的因素通常是最重要的。

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