磨练职业技能，在精不在多。

When sharpening your career skills, focus more on less.

youdao

“朋友”贵不在多，诚即可。

"Friend" you are not more honest you can.

youdao

书籍跟友人，在好不在多。

Books, like friends, should be few and well chosen.

youdao

His father said, "I see you are spending more of your time in idleness than in taking care of business at this crucial time."

他的父亲对他说,"我老是发现,你成天游手好闲,而不在这节骨眼儿上多花点功夫做正经事"

耶鲁公开课 - 欧洲文明课程节选

And Steve Furlanetto--I don't know if Steve is here or not.

还有史蒂夫·弗拉内多,我不知道他今天在不在

耶鲁公开课 - 基础物理课程节选