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。

例句

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。