现在，您可以开始构建回送流程了。
您要什么时候取回送洗的衣服？
我送给约翰一幅画，他回送我一张个人照片。
I presented John a picture, and he gave me his photograph in return.
灯标是向服务器回送数据最快和最有效的方法。
Beacons are the fastest and most efficient way to send data back to the server.
你可以回送他一份礼物，或是下次再请他吃饭。
You could give him a present or invite him to have lunch or dinner next time.
你可以回送他一份礼物，或是下次再请他吃饭。
You could give him a present or invite him to have lunch or dinner next time.
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