单词：toxic substance
toxic substance的用法和样例：
例句
- Toxic materials are one of the factors harming people's health.有毒物质是影响人们身心健康的最主要因素之一。
- Viruses and other toxic substances are quarantined so that they do minimal damage.病毒及其它有毒物质被隔离，以便它们制造的伤害被降低到最小。
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