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太阳黑子 tàiyang hēizǐ
gen. sun spot
radio.amat. sunspot
space sunspot (太阳光球上温度较低的区域,是太阳活动的重要标志); spot
telecom. sunspot
太阳黑子
: 25 phrases in 6 subjects
Business3
Earth sciences1
Economy1
Space4
Technology15
Telecommunications1