式微的闹区地段一度曾是繁华的商业区。

The decadent downtown section was once a flourishing business district.

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嵌入式微控制器是嵌入式系统的核心。

Microcontroller Unit is the core of embedded system.

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嵌入式微控制器是嵌入式系统的核心。

Microcontroller Unit is the core of embedded system.

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