海鸥随浪花一起一伏地漂浮在水面。
罗克珊抑制满腔的怒火，胸膛一起一伏。
沼泽上的柳树，随风一起一伏，泛出白光，就象一片麦田一样。
The willows over all the fen rippled and whitened like a field of wheat.
它大口大口喘着气，很有节律地，带动它庞大的身躯痛苦地一起一伏，一起一伏。
He was breathing very rhythmically with long rattling gasps, his great mound of a side painfully rising and falling.
伏拉汤姆：好吧，迈克尔，和我们在一起，别离开，因为我们想跟你谈谈另一个恐怖的东西，阿尔法常数可能不那么“恒定不变”，好吗？
FLATOW: All right, Michael, stay with us because we want to talk to you about another spooky thing, this alpha constant that may not be so constant, okay?
一个光伏阵列是若干太阳能电池连接在一起的集合。
A photovoltaic array is a linked collection of multiple solar cells.
“我们经历了很多，起起伏伏，富贵贫困，”马克说，“但唯一在乎的事，就是我们还在一起。”
"We've been up and down, rich and poor," says Mark. "But only one thing really matters, and it's that we're alive."
在生命中的前八年，他和我们生活在一起，与我们一起经历了生活中的起起伏伏。
He lived with us during the first eight years of his life and experienced the ups and downs in our lives as well.
在生命中的前八年，他和我们生活在一起，与我们一起经历了生活中的起起伏伏。
He lived with us during the first eight years of his life and experienced the ups and downs in our lives as well.
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