但是，那些模态并不是需要用来描述整个系统的仅有的模态。
But those are not the only modes that are needed to describe the entire system.
研制了一种轻型汽车排气污染物模态分析系统。
A modal analysis system for light truck exhaust gas pollutant has been developed.
本文为道义模态逻辑D—系统建立布尔值模型。
The paper built a Boolean_valued model for the deontic logical D_system .
本文为道义模态逻辑D—系统建立布尔值模型。
The paper built a Boolean_valued model for the deontic logical D_system .
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