慢慢加热糖浆直到它变成金黄色，这就是焦糖化的过程。

Heat the syrup slowly until it turns golden brown; this is how you ___caramelize it.

慢慢加热洋葱会使其焦糖化，味道更甜。

Slowly heating the onions will make them ___caramelize and taste sweeter.