难过而且愤怒
Sad and angry
以上为机器翻译结果，长、整句建议使用 人工翻译 。
人们平常都会遇到一些情绪波动，而且往往并不清楚愤怒或难过背后的原因。
We all experience a number of emotional fluctuations throughout the day, and often we don't even understand what's causing a wave of anger or sadness.
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