更进一步，还要寻找能唱能跳能演的演员，并且年纪足够饰演中年角色。这些在当下都还具有挑战性，克莱默说。
Even finding a cast that could sing, dance and act - and were old enough to play middle-aged characters - was a challenge this time, says Craymer.
软件构架师被证明是软件开发项目过程中最具挑战性的角色。
The role of the architect is arguably the most challenging within any software development project.
我希望本文能帮助您很好地了解这一富有挑战性的角色。
I hope this article gave you a good introduction to this challenging role.
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