We also can draw blind. That means the teacher will show a whole picture to all the students in class except those who will draw on the board.

教师将给全班同学展示一幅完整的画，注意除了几个将要到黑板上去画画的学生不能看到画。

youdao

If I told you that 'draw me a nucleotide from RNA that has ', you could go back to this picture and you could draw the whole thing.

如果让你找RNA中碱基是A的核苷酸,你可以看着这个图,就能找出其全部结构

耶鲁公开课 - 生物医学工程探索课程节选