I've developed this method through personal trial and error, and trust me, it works much much better than the way your were taught in school.

我的这套理念是建立在自己不断尝试的基础上的。相信我，这比你在学校学的方法更奏效。

youdao

Choosing which to use is a matter of design, trial-and-error, and personal preference.

选择哪一些是设计、反复试验和个人偏好的问题。

youdao

My personal suggestion is to not abuse this effect, and if you are going to use it be sure you understand why and under which specific situations this error can happen.

我个人的建议是不要滥用这个效果，如果要用，请你确认你理解其原理并且知道在什么情况下这是错误的。

youdao

What a pity that his service should come to a premature end through the collision of personal error and a zero-tolerance culture.

FORBES: Thoughts On Power, Petraeus and Sex Scandals

Last Monday evening I made a severe error of judgment, failing to protect my personal safety, and became the victim of what was for me a frightening and shocking crime.

BBC: News | UK Politics | Ron Davies's speech in full