你问的这俩是一样的。
1.be made of 是指"由......(材料)做的"其中这个材料是看得出的,即你一眼就可以知道是什么东西做的,比如The desk is made of stone.
2.be made up of 是指"由......构成,组成的" 比如The group is made of five students. The company is made up of ten departments.
3.be made from 翻译出来也是"由......(材料)做的"但是这个材料是经过一系列的变化才变成另一样东西,也就是原材料是看不出来的.比如The paper is made from wood.
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