帮我写一篇关于海豚音的英语文章好吗,我要在班上演讲

你还可以再写“怎样练海豚音”。
英文参考如下（献丑了）：
The real sound of dolphins at the same time must meet the following 3 requirements:
The first non-vocal sounds when the vibration (vibration would be if the vocal cords, vocal cords, at least not muscle strength)
The second non-retroflex lip and teeth (for example, if excluded by blowing lips)
The third more than the frequency of 2000HZ (2000HZ dolphin is the voice of Zuidi Yin).
I made a dolphin sound when touched his Adam's apple, did not feel the slightest vibration, so there first. Useless because the vocal cords, so the sound of dolphins in Liancheng pleasant tone of voice is the most difficult.
As far as I know, the current Dolphins over the sound frequency 2000HZ the only singer Adam Lopez, georgia_brown, Mariah Carey. Zhang Liang Ying is the highest sound of the piano g3 (1568HZ), is not included in the sound of dolphins. Vitas is the highest sound of the piano # d3 (1245HZ) is a vocal sound (Vitas In fac