blush : 侧重因羞愧或尴尬而突然脸红。
- I always blush when I speak in public.
- I blush to think of what a fool I made of myself.
- to blush with embarrassment/shame
尴尬 / 羞愧得面颊绯红
- She blushed furiously at the memory of the conversation.
- He blushed scarlet at the thought.
flush : 强调因愤怒、高兴、羞愧、发烧或酗酒等引起的脸红。
- She flushed with pleasure as she accepted the prize.
- The champagne had caused his face to flush.
- She flushed with anger.