The scientist analyzed the substance under the microscope.
科学家在显微镜下分析了这种物质。
The new law regulates the use of this substance.
新法律规范了这种物质的使用。
The substance was tested for its chemical properties.
这种物质被测试其化学性质。
She discovered a rare substance in the lab experiment.
她在实验室实验中发现了一种稀有的物质。
The doctor warned about the harmful substance in the product.
医生警告产品中有害的物质。
We need to identify the unknown substance in the mixture.
我们需要识别混合物中的未知物质。
The substance changed color when heated.
这种物质加热后变色。
The report highlighted the dangerous substance levels in the water.
报告强调了水中危险物质的水平。
Researchers are studying the effects of this substance.
研究人员正在研究这种物质的影响。
The substance emitted a strong odor when mixed.
这种物质混合后散发出强烈气味。
substance abuse 物质滥用
controlled substance 受控物质
substance dependence 物质依赖
substance use 物质使用
substance testing 物质检测
substance analysis 物质分析
substance exposure 物质暴露
复数: substances;
