You have to feel the pain of a design which has some problem. I guess you only appreciate a pattern once you have felt this design pain.
你必须感觉到一个有许多问题的设计所持有的痛苦。
Back pain can be an indicator of a serious problem (though not necessarily).
后背疼也许是一系列问题的综合表现（尽管不一定总是）。
Sometimes, back pain might be an indication of some other major problem.
有时，背痛是某些其他严重问题的预兆。
Sometimes, back pain might be an indication of some other major problem.
有时，背痛是某些其他严重问题的预兆。
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