短语 “skin and bones 皮肤和骨头” 实际所表达的意思如汉语里常说的 “皮包骨头” 相同，形容人的体型过于瘦。

• My grandmother is very ill at the moment, so she’s lost her appetite. She’s skin and bones now.
  我奶奶现在病的很严重，所以她没有胃口。她现在瘦得皮包骨头。
• Many professional athletes have to work hard to keep weight on. They burn a lot of energy every day, so they have to be careful not to become skin and bones.
  许多职业运动员必须注意保持体重。因为他们每天消耗很多能量，所以需要格外留意不能太瘦。
• We found a dog on the street by our house. He had been abandoned and clearly hadn’t eaten in a long time. He was skin and bones!
  我们在家门口的路上发现了一条狗。它被遗弃了，很明显好久没有吃东西了，瘦得皮包骨头。