know one's onions
精通某一領域
You sure know your onions,buddy!
你應該有所精通
You sure know your stuff, buddy!
你應該有所精通
If you want advice on stocks,go ask Livermore,he has an excellent track record and he certainly knows his onions.
如果你想要股票方面的意見,去問問利弗莫爾好了,它的歷史記錄一直很好,絕對精通這個領域。
It's not surprising that Yi zhongtian and Yu Dan are so phenomenally popular these days.
易中天和于丹能如此受歡迎乃在情理之中。
They sure know their onions.
他們非常精通自己講解的東西。