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sub.stance MATERIAL5sQb7st[ntsnmaterial with particular physical characteristics物质Peat is an organic substance which is formed when plants partially decompose. [C]泥炭是植物部分分解时形成的有机物质。Celery contains a valuable chemical substance that helps lower blood pressure. [C]芹菜含有一种有助于降低血压的珍贵的化学物质。Polluting substances are found in many rivers. [C]许多河中都发现了污染物质。What sort of substance could withstand those temperatures? [U]哪种物质能够承受这样的温度？(fml) Illegal substances are illegal drugs. [C]毒品(fml) Substance abuse is the use of drugs for pleasure.吸毒，滥用毒品(fml) A substance abuser is a person who uses drugs for pleasure.吸毒者，滥用毒品者
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