许多人注意到，随着社会的发展，有许多传统习俗正在消失。
It's widely noted that a lot of traditional customs are disappearing along with the development of the society.
语言是人类认知发展中的一个测试案例，但那些渴望教孩子的父母应该注意。
Language is a test case for human cognitive development, but parents eager to teach their infants should take note.
我们需要注意这个观点，即艺术的发展是在一条直线上发生的，表现形式从简单到复杂。
We need to be careful with the idea that artistic development occurs in a straight line, from simple to complex representations.
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