translation.en: They conduct heat along their length but not across -- well, there is no width, but not in the other direction if you stack them up; that's a property of carbon fiber also.
translation.zh: 它们在长度方向上导热，而不是纵向 事实上它们并没有宽度，如果你把它们堆起来 它们不会朝另一个方向导热。这也是碳纤维的一个特性。