1. Regarding this speech, I want to prove innately why the Chinese language and the American language are different when speaking, why the Chinese language sounds very tight, and the American language sounds very broad. For example, Chinese people use more voices and narrower voices. When Americans singing, they use more breath, and the width of their voices is very broad. Please use some local dialects of the Chinese and native Americans for comparison. You can also use some videos of Chinese singing and American singing to compare and distinguish, and you can use the video of speech for comparison.
2. In addition, please provide me with a PowerPiont to help my speech smoother. Bibliography needs to add a video link that you provide to prove the sound width and narrowness caused by the different languages of the two countries.