1. The first is an automatic, metabolic system whose control is centered in the brain stem. 第一种是自发的新陈代谢系统，它的控制集中在脑干上。
2. Even as a satire, it seems disgusting and shocking in America with its child-centered culture. 即使是作为一种讽刺，在以儿童为中心的美国文化中，它也显得令人厌恶和震惊。
3. All this activity was centered around southern Europe where there is also evidence of ceramics that were created much later. 所有这些活动都集中在欧洲南部，那里也有证据证明陶器是很久以后才创造出来的。
4. Since we have my red laser pointer, we will also try with the red laser pointer, which is centered at wavelength of 700 nanometers. 因为我们有我的红色激光笔，我们也会尝试红色激光笔，它的中心波长是 700 纳米。
5. For example, I've always assumed people who frequently use words like "I", "me", and "mine" are probably more self-centered than people who don't. 例如，我总是假设经常使用“我”和“我的”等词的人，可能比不经常使用的人更以自我为中心。
