thin比较级是thiner
例句
1.
The belt is invisible even under the thinnest garments.
这种腰带即便在最薄的衣衫下都看不出来。
2.
It was crazy of you to go skating on such thin ice.
到这样薄的冰上溜冰，你真是疯了。
3.
Such a thin padded coat cannot ward off the cold mountain wind.
这么薄的棉衣在高山上挡不住寒风。
