词汇	接触物质
释义	接触物质 contact material
随便看	introduce a new subject introduce a new word introduce an innovation introduce an instrument introduce a question introduce a question for debate introduce a radio programme introduce a reform introduce a speaker to an audience introduce a speech Introduce A String Constant introduce a subject introduce a subject into the conversation introduce a television programme introduce a tube introduce a tube into a patient windpipe introduce before introduce boiler introduce broker introduce Buddhism to introduce capital introduce carefully introduce casually introduce ceremoniously introduce certainly