Do not ask why the secret of success, and try my best to do what you should do.

勿问成功的秘诀为何，且尽全力做你应该做的事吧。

youdao

The psychologist alone can ask such questions: Why do we smile when pleased and not scowl?

只有心理学家才会问这样的问题：为什么我们高兴时微笑，而不是怒容满面？

youdao

We might well ask why our bodies do not repair themselves better.

我们可能会问，为什么我们的身体不能更好地自我修复。

youdao

The first step to insight is to ask questions like why do things fall down and not up?

起初的洞察力是问问题,为什么物体坠地而不是上升？

耶鲁公开课 - 心理学导论课程节选

Please do not ask why, but in Tarpon Springs, Greek restaurants started hiding a dollop of potato salad inside a regulation Greek salad - now you can find this odd combination throughout central Florida.

BBC: Feasting in Florida

While many are quick to question why one would choose not to have kids, few ask themselves why they do have kids or are prepared for the reality.

FORBES: Why Have Kids? Exposing The Motherhood Paradox

The precedent would be poor for discipline as Conservative MPs would ask why they should follow the rules if others do not and get away with it.

BBC: Nadine Dorries' fate rests on slip of paper