微擾展開 wēi rǎo zhǎn kāi

DEFINITIONS

  1. perturbative expansion (physics)

CHARACTERS

微 wēi
HSK 4
small, prefix micro-, trifling
擾 rǎo disturb, annoy, agitate
展 zhǎn
HSK 4
open, unfold; stretch, extend
開 kāi open; initiate, begin, start