Outcome

First audio, I put the microphone really close to the reader(less than 20cm). I did not set the microphone in front of her mouth, but slightly left of her mouth, because I wanted to avoid pops. Clearly, the first audio sounds really loud and there are lots of clipping, that is, the frequency gets out of range, because her volume varies a lot when reading, so sometimes I can get really nice frequency but sometimes not. And lots of the high frequency is cut off by audacity. It is a bad idea to put this dynamic microphone really close to record human voice. 

Careful, it is really loud...(out of critical distance)

In the second audio, I put the microphone further away from the reader(about 40cm). This time, the audio is much better, the frequency is normalized and there is no clipping. It sounds smooth and more comfortable since it is in critical distance.