动词
中文翻译：专门从事
同义词：
['specialize in', 'specialize in']
例句：
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1. He specializes in painting landscapes.
他专门画风景。
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2. She specializes in teaching English to foreigners.
她专门教外国人英语。
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3. The company specializes in manufacturing high-tech products.
这家公司专门制造高科技产品。