Watermelons are more than twice as expensive if you buy them out of season.

如果 你在淡季里买西瓜，价格会贵出两倍以上。

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Today, a college education is more than twice as expensive as it was in the early 1990s, even after adjusting for inflation.

就算考虑通货膨胀而进行了调整，今天上大学的费用比20世纪90年代贵了两倍。

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You can travel more often and explore different places because it is twice less expensive than traveling as a couple.

你可以更经常的旅行并且探索不同的地方，因为这花费仅为夫妻一同旅行费用的一半。

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Families in the mid-range of this community made more than double the national median income, and the median home was more than twice as expensive.

NPR: Weak Housing Market May Not Be Signal to Buy

The gallium cells can provide almost 50 percent more power than silicon photovoltaic cells, but are nearly twice as expensive.

CNN: Michigan solar car team wins 2,400-mile race