迅速蔓延 (seon3 cuk1 maan6 jin4) — rapid spread; to spread rapidly in Cantonese
seon˗₃迅cukˉ¹速maanˍ₆蔓jinˎ₄延Mandarin Pinyin: xun4 su4 man4 yan2
Meaning of 迅速蔓延
nounrapid spread; to spread rapidly
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