flashon Upper intermediatealso onBasic words (BNC)? CEFR Mastery level (C2)? Band 3 (BND3)? 一瞬间,闪光,闪现, 反射,闪光 flash flash(noun) 一瞬间,闪光,闪现 flash flash(verb) 反射,闪光 Forms nounverb flash flash