'Versed' means knowing a lot about something, and knowing it well enough to use it, not just having heard of it. It almost never stands alone. It travels with 'in' and, nearly always, with 'well': 'well versed in tax law', 'well versed in the rules of the game'. You can also hear 'poorly versed' or 'not well versed', which is a polite way of admitting you do not really know a subject.

'Versed'「Versed」 means意思是 knowing a lot about something對某件事懂得很多 and knowing it well enough to use it而且懂到能實際運用的程度 not just having heard of it不只是聽過而已 It它 almost never stands alone幾乎不會單獨出現 It它 travels with 'in'總是跟著 'in' and, nearly always, with 'well'而且幾乎都會加上 'well' 'well versed in tax law'「well versed in tax law」（精通稅法） 'well versed in the rules of the game'「well versed in the rules of the game」（熟稔遊戲規則） You can also hear你也會聽到 'poorly versed' or 'not well versed'「poorly versed」或「not well versed」 which is a polite way這是一種客氣說法 of admitting you do not really know a subject用來承認自己其實不太懂某個主題

This is a formal, slightly bookish word. You would meet it in a job advertisement, a report, or a newspaper, and not usually in a chat with friends — a friend would say 'she really knows her stuff'. Because it sounds respectful, people often use it to praise someone's knowledge without sounding like they are testing them.

This這 is是 a formal, slightly bookish word一個正式、有點書卷氣的詞 You would meet it你會遇到它 in a job advertisement, a report, or a newspaper在徵才廣告、報告或報紙裡 and not usually in a chat with friends而不是通常出現在跟朋友聊天的場合 a friend would say 'she really knows her stuff'朋友會說「她真的很懂這一行」 Because it sounds respectful因為這個詞聽起來很尊重人 people often use it人們常用它 to praise someone's knowledge來稱讚某人的學識 without sounding like they are testing them又不會讓對方感覺像是在被考試

One small oddity: although it looks like the past tense of a verb, there is no ordinary verb 'to verse' behind it in this meaning. It comes from an old Latin idea of turning something over — the way you turn a subject over and over until you know it.

One small oddity有個小小的奇特之處 although it looks like the past tense of a verb雖然它看起來像是某個動詞的過去式 there is no ordinary verb 'to verse'但背後其實沒有一個普通的動詞「to verse」 behind it in this meaning在這個意思裡 It它 comes from源自 an old Latin idea一個古老的拉丁概念 of turning something over意思是把某個東西翻過來 the way you turn a subject over and over就像你把一個主題翻來覆去地想 until you know it直到弄懂它為止

(Young people do say 'let's verse each other' for playing against someone, but that grew out of 'versus' and has nothing to do with this word.)

(Young people do say年輕人確實會說 'let's verse each other'「let's verse each other」 for playing against someone表示要跟人比賽 but that grew out of 'versus'但那是從「versus」演變來的 and has nothing to do with this word跟這個詞一點關係也沒有）