If you don't eat more you'll soon be a bag of bones.你要再不多吃些，真的要变得骨瘦如柴了。The child was just a bag of bones when we found her.我们找到那个女孩时，她瘦得都皮包骨头了。I can't believe how thin he is. He's just a bag of bones.我不敢相信他那么瘦，就剩下一把骨头了That girl's nothing but a bag of bones.那个女孩根本就是皮包骨。