planar epitaxial transistor

例句：

1. 1.The floor is planar and smooth.
   地板是平直光滑的。
2. 2. The car's roof is planar, which makes it easy to clean.
   汽车的顶棚是平直的，这使得清洁变得容易。
3. 3.The table is planar, so it can be easily moved around the room.
   桌子是平直的，所以它可以在房间里轻松移动。