He grumbles every so often, but that's part of his strength.
他的确最近经常发牢骚，但是这是他动力的一部分。
He has a mean disposition, and grumbles at everything.
他性情古怪，对一切都抱怨个不停。
He has everything he needs, but he is still full of grumbles.
他需要的一切都得到了，却还牢骚满腹。
He has everything he needs, but he is still full of grumbles.
他需要的一切都得到了，却还牢骚满腹。
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