On scientific subject, the teacher teachs us to had done a lot of tests, but most let what I like or do " earthy phone " this experiment. The ring that attend class rang, mr. Huang that teachs science walked into a classroom, say to us: "We are done today ' earthy phone ' . " I or first time hear of " earthy phone " , I already too impatient to wait. The teacher grants us each group 2 one-time cups mix long term, say next: "Fall in cup bottom drill a hole, extend the line next inside make a written guarantee! " then, each groups of classmates started work in succession. Our group thinks: With what thing is a hole drilled in cup bottom? With the needle, came to hand to be bothered, final decision uses toothpick, go to the lavatory namely safe. I take out toothpick, had been gotten a little while. Should extend the line into cup bottom next, this thing is especially simple, the Zhang Wenyi of our group does not expend a bit interest, had done this thing. In because do the hole too greatly,see other group classmate, increased a lot of troubles for the knot activity below, hit after several knots are trashy also, we thought of a method: It is with transparent glue inside outside affix. We are done according to this method, succeeded as expected. We use same method also had been done additionally directly, " earthy phone " success. I think: this is " earthy phone " , become with a cord electrical wiring, can you also speak like the phone? I what had done " earthy phone " look to the teacher, also told a teacher idea, the teacher says: "Do not believe try with respect to oneself. " Mr. Huang told us the method: "A person says, a person listens, try can you hear? " I gave Zhang Wenyi, give oneself directly, zhang Wenyi says: "Cheng Xujing, was heard? " did not think of I am heard really, make me astonied. Later, I say cooler more, say more amused more, we you say, I listen, you listen, I say, really amused. "Earthy phone " this experiment is really interesting, do you say?