articulation reference equivalent

例句：

1. 1. The teacher explained the new pronunciation rules to us.
   老师向我们解释了新的发音规则。
2. 2. The speech therapist worked on improving her patient's articulation.
   言语治疗师致力于提高她的患者的发音。
3. 3. The singer was able to articulate his lines with ease.
   这位歌手能够轻松地表达他的台词。