and something a lot more similar to

这个和手臂下肢
the development of arms or legs or a visual system.

或是视觉系统的发育很相似
Well, should we believe this?

我们是否应该相信这个观点呢
We know there has to be some effect of the environment

我们知道很明显某些环境作用
shaping language, obviously,

塑造了语言
because in order to know English you have to have heard English,

因为要理解英语你必须听过英语
in order to know Dutch

要理解荷兰语
you have had to heard, to--had to have learned and heard Dutch.

你必须学过和听过荷兰语
And in fact, languages differ in all the ways

事实上各种语言在我们所讲的
that we were talking about.

各个方面上都是有所差别的
Some languages like English

某些语言如英语
has a-- have a distinction between 'l' and 'r.'

在"l"和"r"之间是有差别的