When the worker finishes its work, it will send a message back to the main thread.

当此worker完成其作业后，它会向主线程发送回一个消息。

youdao

When the shipping process completes, it needs to send a message back to the OrderProcessing component to notify it that the order is complete.

配送流程结束时，需要向OrderProcessing组件发送消息，以通知后者订单已完成。

youdao

When the shipping process completes, it needs to send a message back to the OrderProcessing component to notify it that the order is complete.

配送流程结束时，需要向OrderProcessing组件发送消息，以通知后者订单已完成。

youdao