The desk by made from wood.The desk is made up of wood.这两个句子

记短语：be made from be made up of
be made from表示制成的东西完全失去了原材料的外性和特性,原料在制作过程中发生了化学变化,从成品已无法辨认.如：
⑤Gas is made from coal.煤气由煤制成.
⑥This kind of wine is made from rice.
这种酒是米制成的.
be made up of是“由…组成”的意思.是从外观上看得出的.如：
⑦The article is made up of four parts.
这篇文章有四部分组成.
⑧The sports team is made up of twenty members.
这支运动队有20人组成.