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1·The grin of his friend discompose jack when he tried to make his speech.

杰克想要讲演时，他的朋友裂着嘴笑，使他心里很慌乱。

2·Afterwards, we specified the key technologies on system analysis, real time data flow diagram analysis, task discompose, and so on.

在此基础上，本文提出了在开发嵌入式系统时的系统分析、实时数据流程分析、任务划分等一些关键技术。

3·It firstly transforms the case sets into the binary decision system, then discompose the system into some simple subsystems according to decision attribute.

提出一种新的粗集知识获取方法，首先将事例集表示成二元决策系统，然后将其分解成一系列单一二元决策子系统。