勒紧腰部，以使身体具有曲线美to girdle one's waist

• 收腹、平臀、束腰等可以展现人体的优美曲线。

  Holding in one's stomach, drawing in one's buttocks, and girdling one's waist can all serve to highlight the beautiful lines of the body.

• 孕妇要尽量注意不要束腰。

  Pregnant women must take care not to girdle their waists.