notation for field node

例句：

1. 1. The artist drew anotation of the landscape on the canvas.
   艺术家在画布上绘制了风景的记号。
2. 2. The scientist used a notation to record the results of his experiments.
   科学家用一种记号来记录他的实验结果。
3. 3. The teacher wrote a notationon the blackboard to explain the concept.
   老师在黑板上写下了一个记号来解释这个概念。