CAD model is both a hot topic in the heterogeneous object research and a fundamental problem in the digital concurrent design and manufacturing of IFMC.

CAD模型是非均质材料零件设计与制造研究的热点问题，也是理想材料零件数字化并行设计与制造中的基础问题。

youdao

This is what he says in this first passage. He says: If we study speech from several viewpoints simultaneously, the object of linguistics appears to us as a confused mass of heterogeneous and unrelated things.

这也是他在第一篇文章里说的话：,我们同时从几个角度读这篇文章，这时语言学乱的像一锅粥,没有系统毫无关联性。

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