proficient in
collocation擅长；精通（某领域或语言）
She is proficient in French and German.
她精通法语和德语。
熟练的；精通的
先理解核心含义，再看它在真实句子里的用法。
熟练的；精通的
Skilled or good at something; having knowledge and ability.
She is proficient in three languages.
她精通三种语言。
擅长某事；熟练；流利；尤其在任务或技能方面有经验
Good at something; skilled; fluent; practiced, especially in relation to a task or skill.
具备或展示知识、技能和能力
having or showing knowledge and skill and aptitude
与技术或实际技能的熟练程度相关
of or relating to technique or proficiency in a practical skill
He is a highly proficient computer programmer.
他是一位非常熟练的计算机程序员。
AI contextual example
With enough practice, anyone can become proficient at this task.
经过足够的练习，任何人都能熟练完成这项任务。
AI contextual example
a proficient engineer
一名熟练的工程师
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擅长；精通（某领域或语言）
She is proficient in French and German.
她精通法语和德语。
擅长（做某事）
He is proficient at solving complex problems.
他擅长解决复杂问题。
熟练掌握（工具、软件等）
All staff should be proficient with the new office suite.
全体员工都应熟练掌握新的办公软件。
非常熟练的；十分精通的
The role requires a highly proficient network engineer.
该职位要求一名非常熟练的网络工程师。
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Pro（职业）像鱼（fish）一样游刃有余，proficient 就是熟练精通。
语域：formal 常见场景：简历或求职描述、学术或专业评估、正式书面说明 proficient 是比较正式的说法，多用于简历、学术评估或正式场合描述技能熟练；日常口语中更常用 good at 或 skilled。
熟练的，常与in或at连用表示在某方面熟练
Dictionary facts from ECDICT, WIKTIONARY.