EN specialize
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{Verb}

specialize (auch: specialise)
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专营 [zhuānyíng] {Vb.}
specialize (auch: to specialize, specialise)
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专门研究 [zhuān mén yán jiū] {Vb.}
specialize (auch: to specialize, specializing, to major, specialise)
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专攻 [zhuān gōng] {Vb.}