第三，要设定一个较长的有效时间范围。

Third, set a long time-horizon.

youdao

当然，你需要设定好时间、费用、可选项等等的范围。

Of course, you set boundaries of time, money, choices, and so forth.

youdao

当然，你需要设定好时间、费用、可选项等等的范围。

Of course, you set boundaries of time, money, choices, and so forth.

youdao