代理人有以下几个特点。
近期公开发表的《〈自然辩证法概论（教学大纲）〉征求意见稿》有以下几个特点：（1）维持了“三大块”的理论框架；
The draft of'An introduction to dialectics (teaching programme)'"published recently bears characteristics as follows: (1) it maintains the theory frame of "three main parts";
不同类型的水泵，其故障的表现形式不一样，但概括起来，有以下几个共同特点。
Different types of pumps, their fault not the same as the manifestations, but can be summarized as the following common characteristics.
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