separately heated cathode

例句：

1. 1.The process of separating gases involves heating the mixture and then cooling it to separate the gases.
   分离气体的过程涉及加热混合物然后冷却以分离气体。
2. 2. In a furnace, the hot gases are separated from the cooled metal by a moving grate.
   在炉子中，热气体通过移动的炉栅与冷却的金属分离。
3. 3.The separation of elements is crucial for understanding their properties and behavior.
   元素分离对于理解其性质和行为至关重要。