这里有30多名学生，他们准备好接受一项对他们这个年龄的孩子来说很困难的挑战。
There are more than 30 students here, ready to take on a difficult challenge for kids of their age.
作为非洲真诚可靠的朋友，中国对非洲面临的困难和挑战感同身受。
As a true and tested friend, China fully understands the difficulties and challenges facing Africa.
假设存在所有这些挑战，创建一个可靠的TCS对任何实现面向服务的体系架构的人来说都是困难的任务。
Given all of these challenges, creating a reliable TCS is a difficult undertaking for anyone implementing a service-oriented architecture.
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