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这家商店专营手工制作的巧克力。
英语阐明:to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than on others 专门研究(或从事);专攻:

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这家商店专营手工制作的巧克力。
英语阐明:to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than on others 专门研究(或从事);专攻: