每日口說挑戰 如果再也不刷牙了會怎樣？ (Here's What Happens If You Stopped Brushing Your Teeth)

今日挑戰句子

Soon enough, that infection will trigger your immune system which sends fighter cells to battle the bacteria.

很快地，感染開始觸動免疫系統，白血球和細菌大戰。