标注

例句：

1. 1. Theartist carefully drew a detailed map of thecity.
   艺术家仔细地画了一幅城市详细的地图。
2. 2. The teacher marked the important pointsin the text with an asterisk.
   老师在文本中用星号标出了重要的观点。
3. 3. The scientist labeled each samplewith its corresponding chemical formula.
   科学家给每个样本标上了对应的化学式。