太陽活動 (taai3 joeng4 wut6 dung6) — solar variation in Cantonese
taai˗₃太joengˎ₄陽wutˍ₆活dungˍ₆動简 太阳活动
Mandarin Pinyin: tai4 yang2 huo2 dong4
Meaning of 太陽活動
nounsolar variation
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