/l/
在元音后（在词尾）有两种发法，第一种是你在单词中的读法，舌尖不抵住上齿龈；第二种是：
- The tongue tip and a portion of the tongue blade contact the alveolar ridge in the midline
舌尖抵住上齿龈或上牙，两门牙中间，（舌面不要平铺，要变成细舌）。
- Lip configuration may vary depending on phonetic context
嘴唇不要变化 （尤其不要前突）。
- The vocal folds are abducted and vibrating
- The velopharyngeal port is closed
- Acoustic energy radiates laterally, around midline closure
-
/r/
- The tongue is elevated towards the hard palate in a bunched configuration
- The front of the tongue is usually close to the alveolar ridge but may be retroflexed.
- The lips are slightly unrounded
- The vocal folds are abducted and vibrating
- The velopharyngeal port is closed
下面是这俩个音的视频示范：
http://www.rachelsenglish.com/consonant_l
http://www.rachelsenglish.com/consonant_r
（注：一家之言，仅供参考）
