| 21. | The ship is propelled by steam . |
| 这条船是用蒸汽推动的。
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| 22. | The windows have clouded up in the steam . |
| 窗户蒙上水蒸气，变得模糊不清。
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| 23. | Steam condenses [is condensed] into water when it touches a cold surface. |
| 蒸汽接触冷的表面时即凝结成水。
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| 24. | Heat causes the conversion of water into steam . |
| 热使水变为蒸汽。
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| 25. | The steam radiator communicates heat to a room. |
| 蒸汽散热器向房间输送暖气。
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| 26. | There is constant steam communication between…. |
| …之间不断有轮船来往。
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| 27. | The window-panes are dim with steam . |
| 玻璃窗因为蒙上了一层蒸汽而模糊不清。
|
| 28. | set up a steam engine. |
| 安装蒸汽机。
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| 29. | The drop in temperature condensed the steam to water. |
| 温度下降使蒸汽凝成了水。
|
| 30. | The stokers got up steam . |
| 司炉增加了蒸汽的压力。
|