在二元对立的哲学视阈中，物质概念是一个高度抽象了的概念，因而它不再是指称现实的物质的概念；
In the philosophical view of dual opposite, substance is a highly abstract concept. Therefore, it does not refer to the concept of substance in the real world any longer.
济南市是经济高度集中的单核心城市，核心区经济实力强大，而腹地则相对实力较差，城乡二元结构明显。
Jinan is a single core city with highly concentrated economy, with powerful core region economy, and relatively weaker hinterland economy. It is an obvious dualistic structure.
该航太器采用一个整体的二元组推进系统进入月球轨道和维持轨道高度及状态。
The spacecraft USES a bipropellant integrated propulsion system to reach lunar orbit as well as orbit and attitude maintenance while orbiting the Moon.
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