thin是什么意思

　　例句：

　　The dog was painfully thin.

　　那条狗瘦得可怜。

　　The sheets have worn thin.

　　床单已经磨薄了。

　　She was pathetically thin.

　　她那时瘦弱得可怜。

　　He has a large body, but thin legs.

　　他身宽腿细。

　　His mouth tightened into a thin line.

　　他的嘴抿成了一道细缝。