toxic substances
有毒物质
chemical substances
化学物质
hazardous substances
危险物质
natural substances
天然物质
organic substances
有机物质
synthetic substances
合成物质
biological substances
生物物质
controlled substances
管制物质
substances abuse
物质滥用
substances identification
物质识别
different substances react in various ways when combined.
不同的物质在结合时以不同的方式反应。
many substances can be harmful if ingested.
许多物质如果摄入会有害。
scientists study the properties of substances to understand their behavior.
科学家研究物质的性质以了解它们的行为。
some substances are essential for human health.
某些物质对人类健康至关重要。
substances can change state from solid to liquid when heated.
物质在加热时可以从固态变为液态。
it's important to store hazardous substances properly.
妥善储存危险物质很重要。
natural substances often have medicinal properties.
天然物质通常具有药用特性。
some substances can be recycled to reduce waste.
某些物质可以被回收以减少废物。
substances in the environment can affect wildlife.
环境中的物质可能会影响野生动物。
researchers are developing new substances for renewable energy.
研究人员正在开发用于可再生能源的新物质。
toxic substances
有毒物质
chemical substances
化学物质
hazardous substances
危险物质
natural substances
天然物质
organic substances
有机物质
synthetic substances
合成物质
biological substances
生物物质
controlled substances
管制物质
substances abuse
物质滥用
substances identification
物质识别
different substances react in various ways when combined.
不同的物质在结合时以不同的方式反应。
many substances can be harmful if ingested.
许多物质如果摄入会有害。
scientists study the properties of substances to understand their behavior.
科学家研究物质的性质以了解它们的行为。
some substances are essential for human health.
某些物质对人类健康至关重要。
substances can change state from solid to liquid when heated.
物质在加热时可以从固态变为液态。
it's important to store hazardous substances properly.
妥善储存危险物质很重要。
natural substances often have medicinal properties.
天然物质通常具有药用特性。
some substances can be recycled to reduce waste.
某些物质可以被回收以减少废物。
substances in the environment can affect wildlife.
环境中的物质可能会影响野生动物。
researchers are developing new substances for renewable energy.
研究人员正在开发用于可再生能源的新物质。
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