4个”制成“短语的差别be made of/ be made from

be made of

be made from
be made in
be made into

(1) be made of表示"由…制成", 一般指能够看出原材料，或发生的是物理变化。

This table cloth is made of paper.这张桌布是由纸做的。

(2) be made from也表示"由…制成"，但一般指看不出原材料，或发生的是化学变化。

The lifeboat is made from some special material.这个救生艇是由某种特殊材料制成的。

(3) be made in指的是产地，意思为"于…制造"。

My mother likes to buy things which are made in China.

我妈妈喜欢买中国产的东西。

(4) be made into的意思为”被制成为…"。