Thanks for your compliment,全国牙防组and Billnet. Seems

Seems this audio piece works, but I can hear it.

Some Chinese people said I still had some Chinese accent. But some American friends of mine think I speak English without any hint of Chinese Accent.

按照全国牙防组的建议，我没准备，看了一遍就录的音。这样容易找问题。

谢谢。