I am just talking about commonly used pronunciations in US. You don't need to change your own ones. 

*) "tr" sound is prone to sound like "츠루" rather than "트루/트로".

ex) traking [츠뢔낑], tree [츠뤼], try[츠롸이]

*) "L" [에읠] sound is a bit unique. It has its own vowel.

ex) wheel [위읠], stylish[스타이읠리쉬]

*) when a "격음" is in the middle of word, it sounds like a bit "경음".

ex) apple [애쁠], traking [츠뢔낑]