Their fathers were liberal professionals, engaged in engineering (4), business (3), science (2), and medicine (1).
他们的父亲都是自由职业者，从事工程(4人)、商业(3人)、科学(2人)以及医学(1人)。
Machinery engineering specialty or economy class bachelor degree or above, majored in machinery engineering professionals must possess good basic knowledge in science and engineering.
机械类工科专业或经济类大学本科及以上学历，机械类工科专业需具备较好的理工科基础知识。
Machinery engineering specialty or economy class bachelor degree or above, majored in machinery engineering professionals must possess good basic knowledge in science and engineering.
机械类工科专业或经济类大学本科及以上学历，机械类工科专业需具备较好的理工科基础知识。
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