I am pretty sure that的意思|示意

Far be it from me to tell you what to eat but I am pretty sure your stomach can't break that down any better than the mold and microbes in the air.

我不会告诉你应该吃什么，但是我觉得和空气中的霉菌和微生物相比，你的胃不会更好地消化处理这些食物的吧。

True, some people do know the moment they meet their partner that it is right, but in your case, you've made a profession of instant love affairs, so I am pretty sure this isn't the real thing.

一旦你搭上了新的伙伴，你的神经本能便好象突然消失了，你完全迷失在“我们的关系太棒”了这种虚幻的东西里面，可事实上你可能对这个人还根本不了解，而这正是要点所在。

I am pretty sure that you are familiar with all of them.

我相信你对它们相当熟悉。

I am pretty sure that they are "public places" in the normal sense.

我可以肯定地说通常的理解这些地方属于公共场合。

Also not sure if I'm really behind but I just came across digital photo frames and being the gadget junky that I am, I think they are pretty awesome.

我不敢肯定我是不是很落后，我刚刚才接触数码相框和其他一些小玩意，我觉得它们太强大了。

I am sure that 90% of the time you felt pretty bad after succumbing to those temptations. I know that I did.

90%的时候，当你屈服于这些诱惑，你都会感觉糟糕。