它的自然和可改变周期和速度一定是保持在与上面和处理根据到那时代。
Its spontaneous and changeable cycles and speed must be kept up with and handled according to The Times.
调节超声波，可改变光脉冲的强度和周期。
Modulating the ultrasonic wave, intensity and period of the light pulse will change.
结论锌缺乏可改变培养长骨的细胞周期，诱导细胞凋亡，但锌过量对细胞周期和细胞凋亡没有影响。
Conclusion: Zn deficiency can alter cell cycle, and induce cell apoptosis of cultured bones, but Zn excess has no effect.
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