Usage note
物质是指组成东西的材料,比如水、木头、石头都是不同的物质。
Wùzhì shì zhǐ zǔchéng dōngxi de cáiliào, bǐrú shuǐ, mùtou, shítou dōu shì bùtóng de wùzhì.
Substance refers to the material that makes up things, such as water, wood, and stone being different substances.
物质是指组成东西的材料,比如水、木头、石头都是不同的物质。
Wùzhì shì zhǐ zǔchéng dōngxi de cáiliào, bǐrú shuǐ, mùtou, shítou dōu shì bùtóng de wùzhì.
Substance refers to the material that makes up things, such as water, wood, and stone being different substances.
在科学课上,老师教我们认识各种物质,比如冰是水的固体物质。
Zài kēxué kè shàng, lǎoshī jiāo wǒmen rènshi gè zhǒng wùzhì, bǐrú bīng shì shuǐ de gùtǐ wùzhì.
In science class, the teacher teaches us to recognize various substances, such as ice being the solid substance of water.
物质 is more formal, often used in science; 东西 is everyday 'thing'.
材料 refers to the stuff used to make things.