So I brush my teeth twice a day, and what if we had a toothbrush that tastes like candy, and when the taste of candy ran out, you'd know it's time to change your toothbrush?
我一天刷两次牙。 要是我们用的牙刷 味道像糖， 当糖的味道没有时， 你就知道是换牙刷的时候了。