material difference的用法和樣例：
例句
用作名詞 (n.)
- Americans view themselves as being in a state of competition with other individuals and families for values that are largely material in character.
美國人看待他們自己當與其他的個人和家庭處在一個競爭狀態中時，價值觀本質上是大量地物質導向。 - Basically light involves a vibrating electric field, and when that field has to push around the electrons in a material its life gets more complicated.
光從本質上看就是一個振蕩的電場，當這個電場碰到介質中的電子，情況變得更加複雜。
