hot-air balloon
US /ˌhɑːt er bəˈluːn/
UK /ˌhɑːt er bəˈluːn/

1.
balão de ar quente
an aircraft consisting of a large bag, called an envelope, which contains heated air, and a basket, called a gondola, suspended beneath it, used for carrying passengers or for sport
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They took a scenic ride in a hot-air balloon over the valley.
Eles fizeram um passeio panorâmico de balão de ar quente sobre o vale.
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The festival featured dozens of colorful hot-air balloons.
O festival apresentou dezenas de coloridos balões de ar quente.