A few bored policemen mill around outside a building the size of an aircraft hangar, outside which bobs a large balloon with the WWF panda on it.

几个闲荡的警察在一座飞机库大小的楼房周围晃悠着，楼房的周围飘着一个巨大的热气球，气球上画着世界野生动物基金的熊猫图案。

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He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.

VOA: special.2009.01.14

They often end with a large payment, a balloon payment, which owners usually refinance.

VOA: special.2009.09.04

Tethered to a large helium-filled balloon, the 23-pound Sword, as it's known, was able to climb up and down the long cable while workers kept the balloon steady with guide ropes.

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The iconic balloon (itself large enough to spread over 40 acres) carried our new hero aloft and fans watched as he dropped at Mach 1.24.

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Nested gimbal supports, in turn, can keep a telescope as large as 1500 pounds and 24 feet long on target in the midst of both balloon motion and occasional stratospheric wind gusts.

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