Now we've used this research to try to understand not just how a normal person develops, and elaborates their skills and abilities, but also try to understand the origins of impairment, and the origins of differences or variations that might limit the capacities of a child, or an adult.
我们使用这个研究 不止为了尝试理解一个正常人是如何发展的， 如何发展他们的技能与能力， 同时也是为了尝试理解 缺陷发生的起点， 变化或变异的起点， 这些可能会限制孩子或成人的能力。