thin是什麼意思

例句：

The dog was painfully thin.

那條狗瘦得可憐。

The sheets have worn thin.

牀單已經磨薄了。

She was pathetically thin.

她那時瘦弱得可憐。

He has a large body, but thin legs.

他身寬腿細。

His mouth tightened into a thin line.

他的嘴抿成了一道細縫。