how fast does a dalloon travel?

how fast does a dalloon travel? How fast does a balloon travel? how fast does an aeroplane travel? how fast does a balloon travel?How about an overplance?How a How fast can a ball travel in an Olympic table tennis match? 英语翻译Table TennisQ:How fast can a ball travel in an Olympic t 2. How does Travel Benefit an Individual 英语翻译* How fast does the process occur or machine operate?* A how fast does a car run?60 kilometers an hour,60 kilometers How many miles per hour does it travel 中文翻译 How far does your family travel every day ___together ,about How far does you travel to school?是啥意思?