事实上，这个家庭已经节省下68美元，这在一个人均年收入为160美元的国家是很了不起的。

In fact, the family has saved $68. This is remarkable in a country with an average annual income of $160.

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研究表明，在世界各地，社交媒体的人均使用时长为每天2小时19分。

Research shows that, worldwide, the average person spends two hours and 19 minutes on social media each day.

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任何人均可自由使用，而且明确允许为定制目的所作的更改。

It is available free of use for any person, and expressly permits modification for custom purposes.

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Back in the 1840s, life insurance was very important because the average expectancy of life was only something like forty-five years, so that meant parents were dying left and right.

在19世纪40年代的时候,寿险是非常重要的,因为当时的人均期望寿命,仅为45岁左右,这意味着双亲平均只能活到45岁

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