介词
1. He wasn't ill; he stayed in bed from laziness.
他没病，躺在床上是因懒惰之故。
2. from
2. He is trembling from fear.
他吓得发抖。
3. Steel is made from iron.
钢是由铁炼成的。
4. from什么意思
4. He rose from office boy to managing director in fifteen years.
他十五年里从工友升到总经理。
5. Flour is made from wheat.
面粉由小麦制成。