For most people, one set of strength exercises for major muscle groups performed two to three times a week is sufficient.

对于大多数人来说，一组主要肌群的力量训练只需每周两到三次的训练就足够了。

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As a consequence — and especially for use cases that access both APIs — it is recommended (but not required) to assign the same set of people and groups to the two sets of roles.

因此，尤其是对于同时访问两个API的用例，建议您(但不是必需的)向两组角色分配同一组人员和组。

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We succeeded in identifying a set of brain regions that distinguished the two groups.

我们成功地确认了把两个群体区别开来的一组脑部区域。

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The deal also set up a demilitarized zone along the two countries' border where the militaries of Sudan and South Sudan and other armed groups are not allowed.

CNN: Sudan and South Sudan sign partial agreement