是be an expert in/at/on ,还是be expert in/at/on?

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是be an expert in/at/on ,还是be expert in/at/on?
是be an expert in/at/on ,还是be expert in/at/on?

是be an expert in/at/on ,还是be expert in/at/on?
expert 作形容词就是 be expert on/in/at...
作名词就是 be an expert on/in/at...
或者说 be a world expert on/in/at...等等

expert
n.
专家, 内行, 能手(in, with, on)
熟练者, 有经验者, 老手
【律】鉴定人, 检验人
【军】特等射手
an expert in economics
经济学专家
an expert with the needle
针线能手
an expert on foreign...

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expert
n.
专家, 内行, 能手(in, with, on)
熟练者, 有经验者, 老手
【律】鉴定人, 检验人
【军】特等射手
an expert in economics
经济学专家
an expert with the needle
针线能手
an expert on foreign affairs
外交专家
习惯用语
be expert in ... 在...方面是专家
be expert at ... 在...方面是专家
现代英汉词典expert
adj.
（常与at, in连用）内行的
"At a special swimming pool in Los Angeles, children become expert at holding their breath under water even before they can walk."
"在洛杉矶的特别游泳池里,孩子甚至在会走路之前就能熟练地在水下屏住呼吸。"
Rex soon became an expert at opening the gate.
雷克斯很快就成了开门能手。
Kate's an expert in / at / on teaching small children.
凯特是个幼儿教育专家。
All the young men are expert drivers.
所有这些年轻人都是驾驶能手。
词性变化
n.
（常与at, in连用）专家
an expert in cookery
烹调方面的专家
a cookery expert
烹调专家
简明英汉词典expert
n.
专家, 行家, [军](特等)射手
adj.
老练的, 内行的, 专门的
vt.
在...中当行家, 当专家

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后面那个

be an expert (of)
I'm an expert of English language.
or maybe in?: I'm an expert (in the field of) English language teaching??

是be an expert in/at/on ,还是be expert in/at/on? be expert in与be expert at 的区别 an expert on和be expert in的区别 be expert at doing 还是in doing be expert at与be good at,be expert in与be good in, an expert in/on/at有什么区别 an expert in/at/on/with有什么区别?例子：1.an expert in/at teaching small children意思就是说an expert in和an expert at通用对吗?2.an expert in economics3.an expert on foreign affairs4.an expert with the needles be expert at和excel in的用法 be expert on in at有什么区别都可以用吗有什么区别 expert at/on/in 有什么区别英语翻译At the bench Howl worked a good deal harder and faster than Michael,putting spells together in an expert but slapdash way.expert在这里怎么翻译? Berkeley是哪?Professor Harley Shaiken is an expert on unions at the University of California at Berkeley. 求翻译：她擅长画画 (be expert at) be expert at怎么用举几个例句 expert用法expert后面带介词in,at,on,有什么区别啊? Was it in 1998,when he was still at middle school,______ this boy became an expert at computer?A.which B.where C.that D.when 一个英语选择题求指教If I may say,I'm an expert at matching hairstyles _______ personalities.A.in B.on C.at D.to 请问为什么? 请帮忙翻译：He is an expert in sign language.