那么他们在遇到一个新单词的时候，是怎么知道这个单词如何发音的呢？

@JosephHeinrich

涨点姿势……

楼主SB，难道这里没标发音？http://www.oxforddictionaries.com/definition/english/objectionable?q=objectionable

这里面也有！

http://www.oed.com/view/Entry/52325

楼主就是“一叶障目，不见泰山，而自以为是”。

But in Grade one, the students there don't study phonetic symbols at all!

回复：7楼

What does "there" mean in your words? United States only?

回复：7楼
You said "All people in English-speaking countries don't learn IPA, IPA and part of speech aren't  noted in their dictonaries."
And then, you changed the topic because I'd retorted you successfully!

回复：8楼

All the countries where people speak English as their first language

回复：9楼
注意，All people in English-speaking countries don't learn IPA
意思和Not all people ... learn 相同，我们老师说的

这句话应该改成：
No people in English-speaking countries learn IPA

All people in English-speaking countries don't learn IPA.
意思是不是所有人都学IPA

唔咕。