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| 71. | blow up a balloon |
| 给气球打气 |
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| 72. | balloonical irrigation |
| 气球式灌水 |
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| 73. | unmanned free balloo |
| 无人驾驶自由气球 |
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| 74. | teardrop balloon |
| 水滴状气球 |
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| 75. | constant-level balloon |
| 定高气球 |
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| 76. | unmanned observation balloo |
| 无人观测气球 |
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| 77. | balloon-launched rocket |
| 气球发射火箭 |
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| 78. | Balloon tracking test |
| 气球跟踪试验 |
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| 79. | meteorological observational tower |
| 气球观测塔 |
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| 80. | send up a trial balloon |
| 发送测试气球 |
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