He is a jack of all trades and master of none.

他样样都懂一点，但都不精通。

Don't be a jack of all trades. Be the master of a few.

不做博而不精的人，只掌握几种技能。

Don't try to be a jack of all trades, become a master of one.

不要想着成为万事通，去成为某一样事的专家。

“But it’s good to have explored my potential by being a jack of all trades, ” said Liang.

“但这种多面手的工作对于挖掘个人潜能很有好处。” 梁思敏说道。

Our gardener is a jack of all trades, he can do carpentering, decorating, a bit of plumbing, and so on.

我们的园丁是一个多面手，他会一点木工活、装潢、修理水管，等等。