| 1. | The extra heat energy required to expand a gas against a constant pressure .
恒压下需要额外热能才能使气体膨胀。 |
| 2. | Pub did not want a cigar, but accepting it might improve the atmosphere .
帕格并不想吸雪茄烟，但是接下一支可能会使气氛缓和。 |
| 3. | Surface tension makes the pressure inside a bubble exceed the pressure of its surroundings .
表面张力使气泡内的压力超过其环境的压力。 |
| 4. | With the breaking out of the axis war in 1939, the atmosphere rapidly cleared .
1939年爆发的由轴心国家发动的战争，使气氛迅速地明朗了。 |
| 5. | "my means of ascension and descension consist only in dilating or compressing the gas inclosed in the balloon. "
“我使气球升降的方法，是使气球里的气体膨胀和收缩。 |
| 6. | An air straightener should be placed down stream from propeller to counteract circular air motion in the tube .
一种气体直线流动器应该使气流从推进器的反作用中使气体的活动在管内循环。 |
| 7. | Jets of compressed air lift the hovercraft off the ground, and flexible skirts around the craft retain the air cushion, and help to keep it stable .
压缩空气的喷射气流将气垫船浮在地面上，船的四周有柔性围裙来维持气垫并使气垫船稳定。 |
| 8. | His attitude created an atmosphere of tension
他的态度使气氛紧张起来。 |
