The wave is to reinforce itself after one round trip.
在一个往返行程之后，波浪加强了其自身的力量。
One Round trip to Philadelphia, please.
请买一张去费城的往返车票。
Officer: Is that a one-way or round trip?
工作人员：单程票还是往返票？
WOMAN: Would you want one-way or round-trip?
女士：你想要单程的还是双程的？
He made the 90-mile round trip in one hour.
他一个小时完成了九十英里的来回旅程。
He made the 90-mile round trip in one hour.
他一个小时完成了九十英里的来回旅程。
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