呃:
1.hiccough
2.HAW
3.Ur
4.eh
Examples:
他说："老兄,原来你在这里,你还活着吗,"
"So there you are,old chap,still in the land of the living,eh?" he said.
啊:
1.ah
2.(interj.)
Relative explainations:
Examples:
1.啊,你在这里呀!
Ah,there you are!
2.哦!天啊!我英文没有考及格!
Oh,dear!I failed in the English examination!
3.啊,好啦,一样白米养百样人嘛.
Ah,well,it take all kinds!
4.啊,我真喜欢这首歌!好高兴!
Ah,I really love this song!I am so glad!
5.多可爱的婴儿啊!
Isn't that baby a dear?