air layer的用法和样例：
例句
- The layer of air near the earth is cooler than an overlying layer.
靠近地表的空气层比其上面的层气温低。 - If the thickness of one air layer is changed, a defect comes into being, and the corresponding defect mode in the PBG will change accordingly.
如果改变某空气层的厚度，会在光带隙中产生缺陷态，缺陷态的位置随该空气层的厚度的改变而改变。
