He is an expert in juvenile delinquency.
他是研究青少年犯罪的专
。
；能手；行；在…中当行
有某项专长，有某方面经验。擅长于某事，侧重技艺或科学方面。在工作或操作中表现出灵巧、熟练。
已掌握某行业的专业技能或手段，或已有从事某一专门工作的本领或技术。
;;
鲁;系统知识，专门知识
意见评估；专鉴定意见；内行意见证词；鉴定人证据；专作证小；专团He is an expert in juvenile delinquency.
他是研究青少年犯罪的专。
I don't profess to be an expert.
我不敢妄称自己是个专。
The governor was an expert at fencing with reporters.
这位州长是搪塞新闻记者的能手。
She is an expert in finance.
她是一名财政专。
Several experts will participate as technical advisers.
几位专将作为技术顾问参加。
I’m no gardening expert, goodness knows!
我可不是园艺专，老天作证！
Many experts have been called in for advice.
许多专被请来商量对策。
He posed as an expert on old coins.
他假装是个
钱币专。
Richard was something of an expert at the game.
理查德算得上是这种比赛的专。
All of them are experts in their chosen field.
他们在各自选定的专业中都是行。
Her sons were experts at getting out of housework.
她的儿子们很会逃避务活。
Experts are warning that acritical fiber deficiency is eminent.
专们警告说，一个纤维缺乏是突出的。
The handwriting expert attested to the genuineness of the signature.
笔迹专作证该签名无讹。
The bomb blew up as experts tried to defuse it.
专们试图拆除引信时炸弹爆炸了。
The fingerprint expert was asked to testify at the trial.
纹专应邀出庭作证。
I demand the submission of the signature to an expert.
我要求把这签名提交专鉴定。
Experts regarded it as a warning signal of an economic smashup.
专们把它看作是一场经济灾难的警告信号。
Mr. Smith gradually garnered a national reputation as a financial expert.
史密斯先生逐渐赢得全国金融专的声誉。
This report would be intelligible only to an expert in computing.
只有计算机运算专才能看懂这份报告。
Experts fear that there will be new outbreak of the disease.
专们担心这种疾病会再度流行。
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