它是一个气球。
充气式航天器并不是什么新颖的想法，NASA的第一颗通讯卫星回声1号实际上就是一个宽30米的聚酯薄膜大气球，它是用来发射来自地面的无线电广播的。
The idea of inflatable spacecraft is not new. The Echo I - NASA's first communication satellite - was essentially 100-foot-wide Mylar balloon that reflected radio transmissions from the ground.
(它是)一个蓝色的气球。
这是为威尼斯双年展设计的一个装置，它是一系列银色的氦气聚酯薄膜气象气球，它们通过绿色的绳子与地面连接。
Created for the 2010 Venice Biennale, a series of silver helium-filled mylar weather balloons are tethered to the ground with green straps.
这是为威尼斯双年展设计的一个装置，它是一系列银色的氦气聚酯薄膜气象气球，它们通过绿色的绳子与地面连接。
Created for the 2010 Venice Biennale, a series of silver helium-filled mylar weather balloons are tethered to the ground with green straps.
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