We fear the breakdown of the electric grid, the end of non-renewable resources, the expansionof deserts, the loss of islands, and the pollution of our air and water.
我们担心电网会崩溃、不可再生资源会枯竭、沙漠会扩张、岛屿会消失、空气和水会受到污染。
2
The soaring number ofair passengers has accelerated expansionof China's airports.
旅客吞吐量的激增促使机场的不断扩建。
3
For any given portion ofair, the greater expansion ratio allows more energy to be converted from heat to useful mechanical energy meaning the engine is more efficient.