The libraries used by the HelloProgram are a graphics library and a program library, each of which come from a collection of packages produced by the Association for Computing Machinery (ACM).
Hello程序所用到的库包括了图形库和编程库，两者均包含在美国计算机协会(acm)开发的一套库集合中。
He is a member of the ACM and the IEEE Computer Society.
他是ACM和IEEE计算机协会的成员之一。
ACM is a powerful technique to approach Shannon capacity and achieve high throughput in fading channels.
自适应编码调制技术是一项在衰落信道中逼近香农容量限，获得高的系统吞吐量的必需技术。
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