气球是一个透明的结构，根据栖息在气球上的阑尾鱼的类型，气球的设计也有所不同，它还能保护动物，帮助它们保持漂浮。
The balloon, a transparent structure that varies in design according to the type of appendicularian inhabiting it, also protects the animal and helps to keep it afloat.
一个外形和尺寸十分像太空飞船的热气球漂浮在渥太华上空。
A hot air balloon, shaped and sized to resemble the Space Shuttle, drifts over Ottawa.
传统气球因其是橡胶制品且随意漂浮而受到环保主义者的谴责，很快就不再受欢迎了。
Traditional flyaway rubber balloons were under attack from environmentalists and quickly losing their popularity.
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