3. And for a quick quality check, do the "pull test."
迅速檢查質量，做“拉力測試”

Gently tug on the fabric (this work especially well with a skirt or the bottom part of a dress) and then release it. Does the fabric retain its shape? Or does the material look altered?
輕輕地拉下布料（這尤其對裙子或衣服下擺特別有效），然后松開。布料還能恢復原來的形狀嗎？或者，布料看上去變形了嗎？