VOA慢速英语:Early Bedtime for Young Children Could Cut Obesity Risk(翻译)

preschool - n. a school for very young children

obese - adj. fat in a way that is unhealthy

assess - v. to make a judgment about (something)

epidemiology - n. the study of how disease spreads and can be controlled

routine - n. a regular way of doing things in a particular order

cognitive - adj. of, relating to, or involving conscious mental activities

data - n. facts or information used usually to calculate, analyze, or plan something

trade-off - n. a situation in which you must choose between or balance two things that are opposite or cannot be had at the same time

trend - n. a general direction of change