随着我们年老,我们分泌更少能冲洗掉细菌的唾液,因此牙齿和牙龈更容易退化。
As we age, we produce less saliva, which washes away bacteria, so teeth and gums are more vulnerable to decay.
之后,在1994年,研究者们宣称木菜板上保留的细菌比塑料菜板更少。
Then, in 1994, researchers declared that wood retained fewer bacteria than plastic.
肠道细菌水平改变了的小鼠显现出了更少的恐惧,更敢于走进有光照的箱子。这是动物中毒或生病后的普遍症状。
Mice with altered digestive bacteria showed less apprehension and were less afraid to go into the well-lit box, a common sign the animals are under the influence of drugs or illness.
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