This paper begins with "the principle of economy" of the language.
经济原则作为人类语言的普遍特性体现在语言的各个层次和方面。
This paper begins with the definition of education services and quantitative unit.
本文讨论教育服务的定义和服务产出的数量单位。
This paper was left in the copy machine, he says, and begins to read.
这张纸被人留在复印机里，他说。
This paper was left in the copy machine, he says, and begins to read.
这张纸被人留在复印机里，他说。
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