Experiment (8)
The sound of footsteps was particularly harsh in the garage, and Du Guangbai's left foot was slightly inward, and his feet would gently rub together with his shoes when he walked. You can't see anything wrong with sneakers and sneakers, after all, the friction is not loud.
However, when wearing leather shoes, the squeaky friction sound is particularly obvious.
No one will wear leather shoes all the time unless they are necessary.
When he came to the garage, Du Guangbai began to look for Zhao Shuijiang
"Do You Hear It" Experiment (8) is being hit by hand, please wait a moment,
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