Each hair contains its own growth period, grows after 6-8 years and stops growing for a few months, then sheds off.

每根头发都有它自己的生长周期，生长6-8年后，停止生长几个月，然后脱落。

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Using method of integral regression, effect of varying amounts per factor on annual yield and period of positive or negative effect during each growing stage of grasses were given.

用积分回归法分析了牧草生长发育各时段单位因子变化量对年产量的影响程度及正负效应时段。

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The effect of Lys restriction followedby a repletion period on the performance of growing pigs was studied during 3feeding phases, each lasting 28 d.

通过3个饲养阶段，每阶段28天，研究赖氨酸前期限制后期足量供给对生长猪性能的影响。

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The combination of a GOP Congress and Bill Clinton in the White House led to a four-year period of government spending growing by an average of just 2.9 percent each year.

FORBES: Balancing The U.S. Budget Is Simple With Modest Fiscal Restraint