He's using the pumpkins to demonstrate a chemical reaction between water and a compound called calcium carbide.

他用南瓜来演示水和一种叫做石的化合物之间的化学反应。

A tourmaline dryer or comb keeps hair smooth and static-free. Natural-bristle brushes cause less damage to hair.

石吹或梳子头发柔顺，没有静。天然猪鬃的发刷对头发造成的损伤更少。

We went from kerosene lights to carbide lights, propane lights, and finally here comes electricity and it's available to everybody.

我们使用过煤油灯、石灯、丙烷灯，最后迎来了每个人都能用上的灯。