Being natural is good,
孩子的自然成长才是好的,
It is a amazing thing to watch your child growing up day by day.
看着你的孩子一天天地逐渐长大是十分令人惊喜的事情.
解析：
（1）Being natural ——保持自然成长的状态
（2）amazing——adj.令人惊奇的,令人惊喜的
比如：What an amazing sight!
多么使人惊奇的景象啊!
（3）day by day—— 逐日,（一天天）逐渐,
比如：It's getting cold day by day.
天气逐渐冷起来了.
OK!再会!