1. Xem full clip tại đây 2. Tập luyện đoạn hội thoại 3. Clip lồng tiếng ở đây 4. Xem tapescript ở đây · Fly away, balloons · Haha, John. The ballon won’t fly away like that. · The ballons flew away with a house in the cartoon · Those balloons were probably flilled up with helitum gas. You are exxhaling carbon dioxide. Carbon dioxide is heavier than oxygen so your ballon will not fly. · Oh, so, is helium lighter than oxygen? · That’s right. · Oh, I see. I thought balloons would always fly in the sky! · Oh · I completely soaked! · Roy, does it rain on the moon? · ...