Conclusion The toxic effect of fluorine on mouse incisor begins to show at early stage of its development, which is closely related with time and dose.

结论氟对小鼠切牙的毒性效应在其发育初始阶段即已产生影响，并与时间和剂量有密切关系。

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Conclusion There is no significant change of motor black time and it is related to drug dose for 0.5%, 0.75% and 1% ropivacaine in continuous spinal anesthesia.

结论：0.5%，0.75%和1%罗哌卡因用于连续蛛网膜下腔运动神经完全阻滞时间无差异，恢复时间与剂量有关。

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Conclusion There is no significant change of motor black time and it is related to drug dose for 0.5%, 0.75% and 1% ropivacaine in continuous spinal anesthesia.

结论：0.5%，0.75%和1%罗哌卡因用于连续蛛网膜下腔运动神经完全阻滞时间无差异，恢复时间与剂量有关。

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