synchronous-asynchronous motor

例句：

1. 1. The system is designed to be asynchronous, meaning it doesn't need to wait for the other side tostart before starting.
   这个系统是异步的，意味着它不需要等待对方开始才开始。
2. 2.In asynchronous communication, messages are sent and received in separate intervals.
   在异步通信中，消息发送和接收是分开的时间段进行的。
3. 3. The asynchronous nature of the system means that it can handle multiple connections simultaneously.
   系统的异步性质意味着它可以同时处理多个连接。