thin有兩個反義詞：
thin (瘦的)--fat (胖的)
thin (薄的)--thick (厚的)
壹、thin 中文解析：
adj. 薄的;瘦的;稀薄的;微弱的
vt. 使瘦;使淡;使稀疏
vi. 變薄;變瘦;變淡
adv. 稀疏地;微弱地
二、thin例句：
1、A thin cable carries the signal to a computer
壹根細電纜將信號傳送給壹臺計算機。
2、He was a tall, thin man with grey hair
他是個瘦高個，頭發灰白。
3、A thin layer of topsoil was swept away.
薄薄的壹層表土被沖走了。
4、The soup was thin and clear, yet mysteriously rich
湯又稀又清，味道卻出奇地濃。
三、fat例句：
1、I could eat what I liked without getting fat
我怎麽吃都不胖。
2、Because you're not burning calories, everything you eat turns to fat.
由於沒有消耗卡路裏，妳吃的所有東西都會變成脂肪。
3、When you use oil or fat for cooking, use as little as possible.
烹調時不論是植物油還是動物油，都要盡量少用。
4、An easy way to cut the amount of fat in your diet is to avoid eating red meats
減少飲食中脂肪攝入量的簡單方法就是避免吃紅肉。
參考資料
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