The roof is made from discarded tiles.该如何理解?

The roof is made from discarded tiles.该如何理解?
人教版九年级英语 P122的课文中有这样一句话：The roof is made from discarded tiles.这句话中为何用be made from 而不用be made of?另外,他们和be made out of 有什么区别呢?

尔鱼我蚱 1年前已收到1个回答举报

xzqw2004 幼苗

共回答了14个问题采纳率：92.9% 举报

屋顶是由废弃的瓦片做成的.
看得出原料用 of
看不出原料用 from
ba made out of 常用于科技英语,具有双重功能,看得出或是看不出原料都可使用
请及时采纳,不懂继续问( 天天在线）

1年前追问

尔鱼我蚱举报

谢谢你的帮助！可是废弃的瓦片应该是看得出原材料的啊，怎么用的是from 而不是of 呢？

举报 xzqw2004

好多我们自以为能看出原料的东西经过深加工后其实不一定能看出原料

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