拴气球的带子英文称为"balloon string"或"balloon ribbon." 这个词来源于英语中的"balloon"，意思是气球，和"string"或"ribbon"，意思是细长带子。

例句：

Can you tie the balloon string to the chair leg for me? (你能帮我把气球带子系在椅子腿上吗？)
She wrapped the balloon ribbon around her wrist pke a bracelet. (她把气球带子绕在手腕上，就像手镯一样。)
The balloon string was so long that it reached the ground. (气球带子太长了，一直垂到地面。)