由于以时间为转折点的分析方法，必须主观认定结构改变的时间点，方法上较不客观，因此所得出的结论也就相当有分歧。
Because of analytical method taken time as turning point have to be subjective to affirm time of the structure change order, in the method not more objective.
豆科牧草与铁杆蒿的CP以现蕾期为转折点，禾本科牧草则开花初期CP含量较高。
The contents of CP in Legume changed markedly at bud stage. It happened in grasses at early blooming stage.
李清照的一生以“南渡”为转折点，其生活分为美满幸福和流离困苦前后两个不同的时期。
Nandu, as a turning point, made her life divide into two periods of happiness and bitterness.
另外，在外在能力素质上，以2003年为转折点，大学生由以往的强势变为弱势。
On the other hand, on the external quality level, in 2003, a turning piont, students become weak by the strong past.
文中着重对S曲线加减速算法进行了深入的研究，推导出以时间最优为目标、具有恒定速度段的S曲线加减速的计算公式，并通过仿真进行验证，得出加速度曲线的各个时间转折点。
In this paper, it studies the algorithm of S-curve with a constant velocity duration in detail, which takes time optimal into account. A simulate example is taken to test each switching point.
文中着重对S曲线加减速算法进行了深入的研究，推导出以时间最优为目标、具有恒定速度段的S曲线加减速的计算公式，并通过仿真进行验证，得出加速度曲线的各个时间转折点。
In this paper, it studies the algorithm of S-curve with a constant velocity duration in detail, which takes time optimal into account. A simulate example is taken to test each switching point.
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