即将离开知乎
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http://stackoverflow.com/questions/17308956/differences-between-hard-real-time-soft-real-time-and-firm-real-time
您即将离开知乎,请注意您的帐号和财产安全。
http://stackoverflow.com/questions/17308956/differences-between-hard-real-time-soft-real-time-and-firm-real-time