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专门研究 zhuānmén yánjiū
gen. major (in); speciality; specialize (in); specialty; study up
avia. specialize
tech. specialization; special study
M 专门研究 M
construct. make a speciality of
专门 研究 M
: 16 phrases in 8 subjects
Advertising1
Architecture1
Aviation1
Earth sciences6
Economics1
General4
Hydroelectric power stations1
Navigation1