当你评估一个计划、模型、文档或一些其他不可执行的表现物的美好和出色之处时，你只是在推测项目质量和进度。
As long as you are assessing the beauty or goodness of a plan, model, document, or some other nonexecutable representation, you are only speculating about quality and progress.
Sinatra 1.0版的开发进度缓慢的原因，是其采用了语义版本模型
在您按进度努力交付可靠的应用程序时，并发模型之间存在确实的不同。
There are real differences between the concurrency models when you're working to deliver reliable applications on schedule.
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