pitch accent

例句：

1. 1. The singer's pitch accent was perfect for the song.
   歌手的音准完美地适合了这首歌。
2. 2.The teacher emphasized the importance of good posture during the presentation.
   老师在演讲中强调了良好姿势的重要性。
3. 3. The artist added a subtle pitch accent to the painting to make it more expressive.
   艺术家给这幅画添加了一个微妙的音调强调，使其更具表现力。