A drawstring is a cord that goes through an opening, for example at the top of a bag or a pair of trousers. When the cord is pulled tighter, the opening gets smaller.
例句
...a velvet bag with a drawstring.带拉绳的天鹅绒袋子
英英词典释义
Noun
1. a tie consisting of a cord that goes through a seam around an opening;