I adopted a positive outlook on life.

我选择了一种积极的人生观。

This is a positive outlook of life.

这是很正确的人生观念。

That's a very positive outlook on life.

这是一个非常积极的人生观。

Have a positive outlook about your life.

对生活有一个积极的态度。

Keep a positive outlook on your vacation, Farley advises.

Farley建议，对你的假期保持积极的观点。