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major (in); speciality; specialize (in); specialty; study up | |||
specialize | |||
specialization; special study | |||
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make a speciality of |
专门研究 M : 15 phrases in 7 subjects |
Architecture | 1 |
Aviation | 1 |
Earth sciences | 6 |
Economy | 1 |
General | 4 |
Hydroelectric power stations | 1 |
Navigation | 1 |