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- Observation Balloon System 观测气球系统
- Overpressurized zero pressure balloon system 超压零压气球系统
- Incendiary ammunition had been developed for use against observation balloons in France. 在法国，已经研究出用燃烧弹对付侦察气球的办法。
- A balloon floated across the sky. 有个气球从空中飘过。
- I don't want to be around when the balloon goes up. 要出事了，我趁早离开是非之地。
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- He burst the balloon with a prick of the pin. 他用针一戳，气球就爆了。
- A thrust with the pin broke the balloon. 用针一戳，气球就爆了。
- The balloon burst and fell to earth. 气球破裂而落到地上。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- The girl was startled when the balloon exploded. 这女孩在气球爆炸时吃了一惊。
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The cat batted the balloon with its paws. 猫用爪子击打气球。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- The child pricked the balloon and it burst. 那孩子在气球上刺了个洞，气球就爆了。
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- He was taken into hospital for observation. 他被送进医院观察。
- Careful observation convinced them that is was so. 仔细的观察使他们相信情况是这样的。
