translation.en: But our friends who are condensed matter physicists managed to come up, some 50 years ago, with a very nice device, shown under that bell jar, which is a transistor.
translation.zh: 但是我们的高分子物理学家朋友们 可以做到，在50多年前 用一种很好的设备，就是钟罩 它是一种晶体管