基本解释超显微镜的同根派生 英汉例句That is, if it is known there exists a substance in a mixture, the quantity of the substance can be found with an ultravisible spectroscopic instrument. 也就是说，只要知道混合物中某一物质存在，利用紫外-可见光光谱分析仪，就可以将该物质的含量求出来。