The main function shows the standard sequence for sending the message and handling the events.

主函数中给出了用于发送消息和处理事件的标准序列。

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Using the UML extension mechanism, the standard sequence diagram is extended.

运用UML扩展机制，对标准的顺序图进行了扩充。

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One example is the polymerase chain reaction (PCR), a standard technique which employs enzymes to churn out millions of copies of a DNA sequence and involves cycles of gentle heating and cooling.

ECONOMIST: Acoustic microfluidics