Obviously, go for the sugar free gum and pick a flavor (despite it being artificial) that you can tolerate. Toss in a couple sticks of gum and chew away.
显而易见，那就去选无糖口香糖，并挑一个您可以容忍的味道（尽管它是人工合成品）。
3
On both days, some of the subjects were then randomly selected to chew sugar-free gum for half an hour after the meal.