HSK 7-9
情不自禁
qíngbúzìjīn(idiom) cannot refrain from; cannot help; cannot but
听到喜讯她情不自禁地笑了。
Tīngdào xǐxùn tā qíngbúzìjīn de xiào le.
On hearing the good news, she could not help laughing.
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Appears across levels (7-9) in the HSK 3.0 word list.