1、Next, we can use a different and cleaner fuel for the internal combustion engine with other designs.
接下来，我们可以让内燃机使用不同的更清洁的燃料。
2．There are several possibilities being researched at present, such as electric, gas turbine, and “steam” engines.
目前有几种正在研究中，比如电力引擎、燃气轮机、蒸汽机等。
3．However, each of these engine designs has its own disadvantages.
然而，这些引擎的设计自身都有弊端。
4．Last but not the least, we are trying to control the emissions from the internal combustion engine much more strictly.
最后，我们正在尝试更加严格地控制内燃机释放的气体。
5．This, for example, is a catalytic converter, which converts the most dangerous ingredients of the car exhaust into water and harmless gases.
比如，催化式排气净化器，它将汽车废气中最危险的成分转变成水和无害气体。
6．These are five possible ways, then, of controlling air pollution caused by cars.
以上是控制轿车空气污染的五个可行的方法。
7．As I’m sure you can see, there are problems with each of these ways; but at least they’re a step in the right direction.
我相信你们都看到了，每一种方法都存在问题，但是至少它们都朝正确的方 向跨出了一步。
8．Probable the best answer is a synthesis of all five.
也许最佳的答案是对五种方法采取兼收并蓄的态度。
