They can help you pull down the basket or tie the balloon to the ground car until you are ready to fly.

他们可以帮你拉下篮子，或者把气球系在地上的汽车上，直到你准备好起飞。

youdao

Astrophysicists working with ground-based detectors at the South Pole and balloon-borne instruments are closing in on such structures, and may report their findings soon.

天体物理学家利用南极陆基探测器和球载仪器工作，正在对这些云系进行观测，也许不久会报告他们的观测结果。

youdao

Astrophysicists working with ground based detectors at the South Pole and balloon borne instruments are closing in on such structures, and may report their findings soon.

天体物理学家使用南极陆基探测器及球载仪器，正越来越近地观测这些云系，也许不久会报告他们的观测结果。

youdao

Ms. Resler grew up in the more urban milieu of Seattle but had a backyard that she describes as the perfect staging ground for a neighborhood water balloon fight.

WSJ: Backyard Timeshare on the Lower East Side to Open Aug. 1

Unstable means that if an imaginary balloon filled with air from near the ground were to be lifted upward, colliding with some weather feature such as a cold front, the "balloon" would become warmer than the surrounding air at that level.

CNN: The making of a nightmare tornado

After a delay of almost four weeks the BBC Sky Balloon finally got off the ground in County Fermanagh.

BBC: Giant weather balloon carries out its sky mission