Coal mining is an ancient profession, and has been recognized as wildly risky since the very start.
煤矿开采是一种古老的职业，有史以来，就一直被认为是风险极高的职业。
Leather was one of the first manufactured materials, and the leather Technologist can claim to be a member of an ancient profession.
皮革是第一个制造材料，皮革技师也不能自称为一个成员，一个古老的行业。
Modern geisha carry on an ancient profession; they privately entertain Japan's rich and powerful men and maintain total confidentiality.
现代的艺伎继承了日本的古老职业；她们私下里招待日本的富人和有权势的男人并保持着他们之间的全部机密。
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