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expertise; specialized knowledge; technical knowledge; expert knowledge
この仕事には法律の専門知識が必要だ。
This job requires specialized knowledge of law.
専門知識を持つ人材を社内で育成している。
The company is developing employees with specialized knowledge in-house.
その分野の専門知識なしに判断を下すのは危険だ。
Making a judgment without specialized knowledge in the field is risky.