portwine mark

例句：

1. 1. The wine spilled on the table left a portwine mark.
   桌上的酒洒落留下了一个酒渍。
2. 2. The antique vase had been marked by a portwine mark from years of use.
   这个古董花瓶上有一个由年久使用留下的酒渍。
3. 3. The old map was covered in portwine marks, indicating where the explorers had camped.
   旧地图上满是酒渍，表明探险者曾经过夜的地方。