autogram

例句：

1. 1. The artist painted a beautiful self-portrait of himself.
   这位艺术家画了一幅美丽的自画像。
2. 2. The museum has a collection of autograms from the 19th century.
   博物馆收藏了来自19世纪的自画像。
3. 3. The artist's autogram is considered one of the masterpieces of his time.
   这幅自画像被认为是该时代大师作品之一。