M6 U51. diagram /dagrm/ ( diagrams )N-COUNT A diagram is a simple drawing which consists mainly of lines and is used, for example, to explain how a machine works. 示意图例：.a circuit diagram.电路图。2. volcano /vlkeno / ( volcanoes )N-COUNT A volcano is a mountain from which hot melted rock, gas, steam, and ash from inside the earth sometimes burst. 火山例：The volcano erupted last year killing about 600 people.去年那座火山喷发导致大约六百人丧生。3. volcanic /vlknk/ADJ Volcanic means coming
