1. But until recently, the academic edge gained by participating in sports was thought to come from the increased self-confidence, the better mood, and the ability to concentrate that comes from burning off steam in exercise.
    但直到最近，人们还认为因参加体育运动而获得的学业优势来自于增强的自信、更好的心态，以及由运动时消耗体力所带来的集中注意力的能力。

2. When water boils it turns into steam.
    水沸腾而变成蒸汽.

3. Why don´t you steam those lobsters with ginger and scallion now?
    你现在何不把那些龙虾和姜, 葱一起蒸呢?

4. We need to have our rotary engine repaired.
    我们需要让人修一下旋转引擎。

5. We felt sure that sooner or later a stone would rip a hole in our petrol tank or damage the engine.
    我们想念迟早会飞起一个石块把油箱砸开一个窟窿，或者把发动机砸坏。

6. That old engine is the archetype of modern locomotives.
    那台老式发动机是近代机车的原形。

7. They started the engine.
    他们开始发动引擎.

8. The steam escaped with a loud hissing noise.
    蒸汽发出很大的嘶嘶声冒了出 来.

9. The steam-engine piston makes a cyclic motion.
    蒸汽机活塞做往复运动。

10. The engine works satisfactorily.
    这引擎性能良好，令人满意。