If you tie him to a blown-up inner tube, he floats.

如果你把他拴在一个充气的内胎上，他就能浮起。

Do you know how to patch an inner tube?

你知道怎样修补内管吗？

PLGA inner tube array was used as scaffold.

采用内管网高分子聚酯类聚合物(PLGA)材料作为支架。

Inner Tube: oil resistant synthetic rubber.

内胶层：耐油合成橡胶。

If you tie him to a blowed up inner tube he floats.

如果你把他拴在一个充过气的内胎上，他就能浮在水面。