你問我答
名詞 “expert” 后應(yīng)跟 in、on 還是 at？
內(nèi)容簡介
單詞 “expert” 作名詞時(shí)的意思是 “專家，內(nèi)行”，后面可以跟介詞 “in”、“on” 和 “at” 搭配使用。比如，“an expert in chemistry” 和 “an expert on chemistry” 都可以指 “化學(xué)領(lǐng)域的專家”，而在這里用 “in” 或 “on” 的區(qū)別在于 “專家的權(quán)威性”。聽 “你問我答” 節(jié)目講解 “expert” 作名詞時(shí)的含義和用法。
文字稿
（關(guān)于臺詞的備注: 請注意這不是廣播節(jié)目的逐字稿件。本文稿可能沒有體現(xiàn)錄制、編輯過程中對節(jié)目做出的改變。）
Jiaying
大家好，歡迎收聽 BBC英語教學(xué)的 “你問我答” 節(jié)目。With me, Jiaying.
Georgie
And me, Georgie. One of our listeners has asked us a question:
Question
請問：“expert” 后接 “at”、“in” 和 “on” 的時(shí)候有何區(qū)別？除了指 “某方面的專家”，是否也可以表示 “擅長做某事”？當(dāng) “expert” 的釋義是 “權(quán)威人士” 時(shí)，是否就相當(dāng)于 “authority”？
Georgie
This is a great question and I'm sure it causes a lot of confusion! Let's try to help. Jiaying, we work for BBC Learning English, so you could say that we are experts 'in' the English language, and we are experts 'at' making teaching content. There are linguists who have spent decades studying the English language who are leading experts 'on' it.
Jiaying
That's right! 先來區(qū)分名詞 “expert” 后跟介詞 “in” 和 “on” 時(shí)，有哪些差別?！癢e are experts in the English language.（我們是英語語言方面的專家。）” “Expert in + 領(lǐng)域、行業(yè)名稱” 的意思是 “某個(gè)領(lǐng)域的專家”。
Georgie
So, expert 'in' goes with a topic or an area of expertise, like the English language.
Jiaying
你還可以說：“an expert in chemistry（化學(xué)領(lǐng)域的專家）”、“an expert in law（法律方面的專家）”、“an expert in economics（經(jīng)濟(jì)學(xué)領(lǐng)域的專家）”。Let's hear some examples.
Examples
She's an expert in financial analysis.
（她是財(cái)務(wù)分析方面的專家。）
Both my cousins are experts in medieval history.
（我的兩個(gè)表親都是中世紀(jì)史方面的專家。）
Jiaying
接下來，我們說說名詞 “expert” 后跟介詞 “on” 時(shí)的用法。
Georgie
Now, being 'an expert on something' is very similar to being 'an expert in something'. They are often used interchangeably to mean someone is very knowledgeable about a subject.
Jiaying
“An expert on something” 和 “an expert in something” 的意思很相近，兩者都表示 “很懂某個(gè)領(lǐng)域，在這個(gè)領(lǐng)域經(jīng)驗(yàn)或知識豐富”。
但相比之下，“an expert on something” 可能體現(xiàn)了這個(gè)人的觀點(diǎn)更有權(quán)威性。這可能是因?yàn)檫@個(gè)人在該領(lǐng)域作出了顯著的貢獻(xiàn)，得到了更多人的認(rèn)可。比如，“a leading expert on something（某個(gè)領(lǐng)域的權(quán)威專家）” 和 “the world expert on something（某個(gè)方面的世界級專家）”。
Georgie
Yes, so lots of people might be experts in chemistry – they're specialised in and know a lot about chemistry, but fewer people are leading experts on chemistry.
Jiaying
沒錯(cuò)，“an expert on chemistry” 的觀點(diǎn)可能要比 “an expert in chemistry” 的觀點(diǎn)更具權(quán)威性。聽兩個(gè)使用了 “an expert on something” 的例句。
Examples
She is a world expert on climate change.
（她是氣候變化方面的世界級專家。）
He's one of the few leading experts on butterfly eating habits.
（他是為數(shù)不多的研究蝴蝶飲食習(xí)慣的權(quán)威專家之一。）
Jiaying
上面我們介紹了 “expert” 后跟介詞 “in” 和 “on” 時(shí)的用法，下面來看看 “expert” 后跟介詞 “at” 的時(shí)候，與前兩種情況有什么區(qū)別。
“An expert at” 后常跟一個(gè)動作或行為，強(qiáng)調(diào) “一個(gè)人在某個(gè)方面有高超的技能或非常熟練”。在節(jié)目開始，Georgie 說了：“We are experts at making teaching content.”
Georgie
And as the listener mentioned, it's very similar to saying that someone is good at doing something, but it means they are extremely good at doing it. The verb that follows must be in the 'ing' form.
Jiaying
“An expert at” 后跟動詞的 -ing 形式，也就是 “an expert at doing something（做某事的能手、行家）”，它強(qiáng)調(diào)某人 “極為擅長做某事”，要比 “good at doing something 或 good at something（擅長做某事）” 所表達(dá)的技能水平或熟練度還要高。聽兩個(gè)使用了 “an expert at doing something” 的例句。
Examples
The Olympic gymnast is an expert at doing double flips.
（這位奧運(yùn)體操運(yùn)動員是跳雙空翻的行家。）
My best friends are experts at making wooden furniture.
（我的摯友們都是制作木質(zhì)家具的專家。）
Georgie
OK, so shall we summarise, Jiaying?
Jiaying
Of course. 如果我們把某人稱作 “an expert（一位專家）”，那么這個(gè)人 “在某個(gè)專業(yè)領(lǐng)域的經(jīng)驗(yàn)或知識非常豐富” 或 “極為擅長做某事，技藝高超”。但我們需要根據(jù) “expert” 后跟的介詞來具體判斷句子的含義。如果說一個(gè)人是 “an expert on something”，而另一個(gè)人是 “an expert in the same field”，那么前者的觀點(diǎn)可能更具權(quán)威性。“An expert at doing something” 的意思是 “做某件事情的能手、行家”。問題中還提到了 “expert” 的意思是否就相當(dāng)于 “authority”。雖然一位 “expert” 對某個(gè)領(lǐng)域有較深的了解，但只有當(dāng)你的專業(yè)或?qū)W術(shù)經(jīng)驗(yàn)被大家認(rèn)可時(shí)，才會被稱作 “having authority”。
Georgie
Remember, if you have a question about the English language you'd like to ask us, please send us an email. Our email address is: questions.chinaelt@bbc.co.uk
Jiaying
你也可以通過微博向我們提問。我們的微博賬號是 “BBC英語教學(xué)”。Bye-bye.
Georgie
Bye, everyone!
