Severe dieting, eating erratically, or skipping meals upset neurotransmitter levels, leading to feeling grumpy, stressed, or tired.
严重的节食、饮食不正常、或不按时进食，都会破坏神经递质水平，导致性情暴躁、紧张或疲倦。
It was a lovely summer morning, but Roo was feeling grumpy and he didn't know why.
这是一个美好的夏日早晨，但是小袋鼠却正在闹脾气，而且他自己也不知道这是为什么。
It was a lovely summer morning, but Roo was feeling grumpy and he didn't know why.
这是一个美好的夏日早晨，但是小袋鼠却正在闹脾气，而且他自己也不知道这是为什么。
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