其中许多问题涉及较长期的结构变革。
随着时间推移,我注意到其中许多问题是重复的。
Over time, I have noticed that many of the questions are repeated.
朋友的朋友系统提出了许多问题,其中许多问题本质上是社会和法律问题。
The Friend-of-a-Friend system raises many issues, quite a few of them of a social or legal nature.
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