ReadWriteQuiz
Chinese dictionary
sound recording
当爱迪生正努力设法改善电报机及电话机时,却发现可以利用锡箔包裹的滚筒来录声。
While working on improvements to the telegraph and the telephone, Edison figured out a way to record sound on tinfoil-coated cylinders.
当爱迪生正努力设法改善电报机及电话机时,却发现可以利用锡箔包裹的滚筒来录声。
While working on improvements to the telegraph and the telephone, Edison figured out a way to record sound on tinfoil-coated cylinders.