咳血

例句：

1. 1. The hem of her dress is frayed at the seams.
   她的裙子边缘在缝线上已经磨损了。
2. 2. The book's hem is stained with ink.
   这本书的边缘被墨水弄脏了。
3. 3. The hem of her coat is torn.
   她的外套边缘破了。