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反应堆正周期 zhēng zhōuqī
el. positive period
正周期 zhēng zhōuqī
tech. positive period
正周 期: 23 phrases in 12 subjects
Business4
Earth sciences2
Economy1
Electric machinery1
Electronics3
Hydroelectric power stations1
Information technology2
Nursing1
Oil / petroleum1
Space2
Technology4
Wind Energy1