of
be made of和be made from都表示“由……制成”,主語(yǔ)為制成品.
1.be made of 表示制成成品后,仍可看出原材料是什么,保留原材料的質(zhì)和形狀,制作過(guò)程僅發(fā)生物理變化.如：
The kite is made of paper．風(fēng)箏是用紙做的.
2.be made from 表示制成的東西完全失去了原材料的外形或特征,或原材料在制作過(guò)程中發(fā)生化學(xué)變化,在成品中已無(wú)法辨認(rèn).如：
The paper is made from wood．紙是木頭做的.
Butter is made from milk．黃油是從牛奶中提煉出來(lái)的.