第一句里的differences ,应该用复数比较好。

The first "fool" means someone is a foolish。

这样写更好：The former means...前者的意思。。

相应的，the latter means。。。后者的意思是。。。

The second "full" means someone is not hungry

改成：The latter means one is stuffed.

不饿和饱程度上差远了。stuffed，饱了的意思。

Today I will tell a joke [这里用to还是用for] you :

改成：Now,I have a joke for you.

[把这些食物都吃光了] .

and finished them all。

Then he [摸摸自己的肚子] and said"..."

Grabbling his belly，he said,"..."

Do you know the reason ?

Do you know why?

Yes, the man wants to say he is not hungry,

改成 :

yes,the man wanted to say he was stuffed.

stuffed,饱了的意思。

but the others think he says he is a foolish. So Miss Lee often tells us to [正确发音] , or [你将会像这个人一样成为] foolish.that's all ,thank you.

but the others would think he announced himself stupid.So Miss Lee often tells us to pronounce originally,or you will make others misunderstood,and maybe make youself a fool.And that's would be no good but jokes.Thank you.

绝对地道。嘿。