Striving for wealth and power is less likely to bring about happiness and meaning in life than working hard to care for other people and developing intimate bonds.

然而，努力获取财富和权力，却不如努力关心他人、结交亲密的朋友那样能够给人带来幸福和人生的意义。

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Of course, balloons do not last as long as conventional power stations (each is estimated to have a working life of about a year).

当然，气球不会和传统发电站寿命一样长（每只估计有一年的工作寿命）。

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Of course, balloons do not last as long as conventional power stations (each is estimated to have a working life of about a year). But the fuel (sunlight) is free.

当然，太阳能气球的寿命不会和传统发电厂一样，一颗太阳能气球的寿命大约一年，但是燃料(太阳能)却完全免费。

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