Karo Syrup is corn syrup.  Any other brand of corn syrup may be substituted for Karo.  

karo 糖浆是玉米糖浆。其他牌子的应该也可以代替karo.

Dextrose may be substituted for Karo Syrup, yielding a very similar propellant.

Dextrose应该可以代替karo糖浆产生近似的推进效果。

Fructose may be added, giving it even better texture.

可以加入fructose以获得更好的质感。

Golden Syrup may be used by itself to make a good Rcandy.

加入golden 糖浆(?)用于做Rcandy是不错的。

Also, I have heard that Glucose Syrup works just like corn syrup.  

啊对了,我听人家说葡萄糖浆和玉米糖浆烧起来差不多。