发酸

1. turn sour; taste sour

♦ 牛奶~了。 The milk has turned sour.

2. feel a tingle in one's eyes or nose (when about to break down and weep)

♦ 她觉得两眼~, 泪水止不住流了下来。 She felt a tingle in her eyes and could hardly keep from shedding tears.

3. ache slightly

♦ 腰有点~ have a slight backache