As you chew your food, air is forced up your nasal passages, so your olfactory receptor cells are registering information at the same time as your taste receptors are, so you're both smelling and tasting simultaneously.

当你咀嚼食物时，空气会进入你的鼻腔，所以你的嗅觉感受器细胞和你的味觉感受器同时记录信息，所以你能同时闻到和尝到味道。