目前，在世界范围内，80%以上适合种植农作物的土地都在使用中。

At present, throughout the world, over 80% of the land that is suitable for raising crops is in use.

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2015年，美国林务局首次使用55亿美元年度预算的一半以上用于灭火——这几乎是20年前火灾支出所占比例的两倍。

In 2015, the US Forest Service for the first time spent more than half of its $5.5 billion annual budget fighting fires—nearly double the percentage it spent on such efforts 20 years ago.

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例如，自研究开始，高架马桶座圈的使用增加了一倍以上，而浴缸座圈的使用增加了50%以上。

For instance, the use of raised toilet seats has more than doubled since the start of the study, and the use of bath seats has grown by more than 50%.

youdao

Both of these were ideas that were copied all over the world-- that's the way inventions are-- so a lot of insurance policies today have cash values.

以上两个点子后来在全世界被广泛使用,这就是创新,所以现在的很多保单都是有现金价值的

耶鲁公开课 - 金融市场课程节选