be made of ,be made from , be made by , be made in 的区别

[@more@] be made of 和be made from 后面均接“原料”

be made of能看出原材料: The desk is made of wood.

be made from不能看出原材料：The paper is made from wood.

be made by +人表示“由某人或厂家制造”

be made in + 地点表示“在某地制造”

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