动词
中文翻译：精通
同义词：
['proficient', 'proficient in', 'skilled']
例句：
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1. She has become an expert in the field of computer programming.
她已经成为计算机编程领域的专家。
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2. He is proficient in English and can speak it fluently.
他英语很流利，很熟练。
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3. The software engineer has been skilled at developing complex systems for years.
这位软件工程师多年来一直擅长开发复杂的系统。