这样gem用户可以溯及一个gem至可信的源。
This way gem users can trace back a gem to a trusted source.
系统的平均响应时间在多至1000个并发用户时应小于一秒。
The average response time of the system shall be less than one second with up to 1,000 simultaneous users.
一个名为“Chris”的用户会添加至a, B, C的成员区域。
A user named "Chris" has been added to the Members area of a, b, and C.
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