其他人欢迎这种平静但是并不相信它，他们担心这些被正式成为“警察……单元”的警察队伍一旦奥运会结束就会离开。

Others welcome the calm but distrust it, worrying that the police force - formally called "police pacification units" - will leave once the Olympics end.

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在整个历史中婚姻成为最受欢迎的单元，主要因为它是一种有效的安排，有助于孩子的抚养和成长。

Marriage emerged as the most popular institution throughout history primarily because it was an effective arrangement to improve the care and upbringing of children.

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该网站比较受欢迎的特色有视频聊天，由说本族语的人改错的写作练习，复习小测验，和学习单元。

Popular site features include an integrated video-chat-application, writing exercises that can be corrected by native speakers, review quizzes, and learning units.

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