Important faults: Hollow or humped back.
严重缺点：凹形或者有肉隆起的背部。
The white cat humped up her back when she saw the dog.
白猫看见那条狗时便弓起背来。
The cat humped its back when it became angry.
猫发怒时，就把背部向上隆起。
No wonder his back aches when he has been humped over his desk all day!
难怪他的背痛，他伏案工作了一整天！
No wonder his back aches when he has been humped over his desk all day!
难怪他的背痛，他伏案工作了一整天！
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