偷看一眼 sounds like "Ta kan yi yan": wrong lyrics (as happened with 一切都这么美好 which is sung as 一切都变得美好) or weird pronunciation? In the song 忘不了 by Teresa Teng (lyrics here), one line goes:


  偷看一眼


That is, according to online lyrics. Except in this video, both at 00:25-00:26 and at 1:18-1:20, I hear:


  Ta kan yi yan


So are the lyrics wrong, or is it me mishearing, perhaps its /thau/ with the /u/ being almost undetectable, and that is some regional/dialectal pronunciation? How should it be spelt if "Ta kan yi yan" actually makes sense?

Edit

While browsing Youku to respond to @dan's comment with a Youku video, I found this, where the line is:


  他看一眼


That certainly matches the sounds I hear, but what does it mean?
Trying to make sense of a tweet-length song is hard, but since the song is from a romance movie in 1980, it could be a boy meeting a girl for the first time. 


His first glance warmed her and brightened her world. 
His second glance established the fond love and sealed her fate. 


That is all I can think of.