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迅速
xùn sù
  1. 1 rapid
  2. 2 speedy
  3. 3 fast
迅速发展 | 迅速發展
xùn sù fā zhǎn
  1. 1 to develop rapidly
迅速蔓延
xùn sù màn yán
  1. 1 rapid spread
  2. 2 to spread rapidly