As large amounts of dollars flow into China through net exports and foreign investment the Chinese central bank must buy up these dollars at the pegged exchange rate.
由于大量美元通过净出口和外国投资的形式流入中国，中国央行必须按盯住的汇率买进这些美元。
The paper introduces a framework of the signal exchange device, the circuit of CAN bus, the net of CAN bus, and the flow of CAN bus program.
本文介绍了信号转换装置的结构、CAN总线电路、组网，及CAN总线工作的程序流程。
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