单词学习：pang 名词/动词
pang
/pæŋ/
n. 一阵剧痛，一阵痛苦；v. 使剧痛，使极度痛苦
A sudden pang of guilt struck Mr. Gu when he realized he had forgotten his student's birthday.
当顾老师意识到自己忘记了学生的生日时，一阵突如其来的内疚感击中了他。
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