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1·A foster mother is a mother who takes someone else's child into her family and cares for the child for a period of time just as what she would do to her own child.

养母是指把别人的孩子带到自己家里，像照顾自己的孩子一样照顾他一段时间的母亲。

2·After training for a period of time, the researchers tested the bees.

经过一段时间的训练后，研究人员对这些蜜蜂进行了测试。

3·Tribes would stop fighting for a period of time if they found a tree with mistletoe.

如果他们发现一棵树上有槲寄生，部落会停止一段时间的战斗。

4·It peaks in young adulthood, levels out for a period of time, and then generally starts to slowly decline as we age.

它在青年时期达到顶峰，在一段时间内趋于平稳，然后普遍会开始随着年龄的增长而缓慢下降。

5·When that separation lasts for a period of time, the two populations are able to evolve along different trajectories.

当这种分离持续一段时间后，这两个种群能够沿着不同的轨迹进化。

6·By dropping out after studying for a period of time, the two students have wasted educational resources, which could have been provided for others.

两名学生学习一段时间后辍学，他们浪费了本可以提供给其他人的教育资源。

7·In such a life history strategy, the organism suspends any growth, reproduction, or other activities for a period of time so that they may occur at a later, more hospitable time.

在这样的生命史策略中，有机体暂停任何生长、繁殖或其他活动一段时间，以便它们可能在更晚、更适宜生存的时间发生。

8·She should be hospitalized for a period of time.

她得住院治疗一个时期。

9·Sure, it will increase sales for a period of time.

当然，在一段时间内能提高销售量。

10·GetForecast returns the weather forecast for a period of time.

getForecast返回某个时期的天气预报。