物质: matter; substance; material 短语和例子可裂变物质 fissionable material; nuclear materials; 物质以三种形态存在: 固态、 液态和气态。 matter exists in three states: solid, liquid and gas.; 物质不灭定律 the law of conservation
Example Sentences:
1.
Aspirated material from the oral - pharyngeal region contains bacterial flora 经口-咽吸入物质包括细菌。
