返回行程 meaning in English

backstroke
retracting stroke
reversing stroke

On the return journey , the formatter sink transforms the message stream back into the channel message elements return message
在返回行程中，格式化程序接收器将消息流转换回信道消息元素（返回消息）。
If they plan to transit the u . s . after that date and time , however , they must either obtain a visa or change their return itinerary to exclude a stop in the u . s
但是，如果他们计划在上述日期和时间以后过境美国。则必须获得签证，或者改变返回行程，不在美国停留。