The gum, developed by US Army researchers, contains a protein that attacks the bugs that cause plaque, which in turn can lead to gum infections and tooth decay.

• 这种口香糖，由美国军队研究人员研制而成，含有一种能杀灭病菌的蛋白质，这种病菌可能导致牙龈感染及牙齿腐蚀。