Examines after the gastroscope pliers and brus hes examines , to distinguishes the esophagus good , the malignant pathological ch ange has the vital significance .
经胃镜钳检和刷检，对鉴别食管良、恶性病变有重要意义。
Their origins go back to work published in 1983 by louis brus , then at bell labs , in new jersey , though it was several years before another physicist , mark reed at yale university , described these tiny semiconductor clumps as " quantum dots " .
