That would have cleared up this roundtrip issue, but there are two very good reasons this could not be done.

这样就消除了这个往返问题，但是有两个非常充分的理由说明不能这样做。

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Emirates airline canceled 10 roundtrip flights between Dubai and Britain on Thursday because of the ash cloud.

在周四，由于尘云的影响，阿联酋航空公司被迫取消了往返于迪拜和英国之间的10个班次航班。

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The top results from a Bing search for the words “flights from Seattle to San Francisco” include a link that shows a low roundtrip fare of $117.

例如，在Bing中键入“从西雅图至三藩市的航班”得到的首选搜索结果，将包含一个117美元的往返低票价。

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Too many people make the dangerous roundtrip from hospital to nursing facility and back again.

FORBES: How Nursing Homes Can Cut Hospital Readmissions

Welch, who was already walking 3.5 miles a day roundtrip to work, started taking water aerobics three times a week and swimming again competitively.

CNN: Tired of slights, embarrassment, man sheds 87 pounds

The average trip will stretch 626 miles, though 54% of those surveyed said their Labor Day excursion will fall between 100 and 400 miles roundtrip.

CNN: AAA: More travelers to hit the road during Labor Day weekend