n.黑板

原形：chalkboard复数：chalkboards

The teacher wrote the lesson's objectives on the chalkboard.
老师在黑板上写下了这节课的目标。
Before class, the students wiped the chalkboard clean.
课前，学生们把黑板擦得干干净净。
We used to play hangman on the chalkboard during recess.
我们过去常在休息时间在黑板上玩猜字游戏。
The professor drew a diagram of the human heart on the chalkboard.
教授在黑板上画了一幅人体心脏的图示。
The substitute teacher struggled to find a working piece of chalk for the chalkboard.
代课老师费力地找了一支能在黑板上写字的粉笔。
After the lecture, the students copied the notes from the chalkboard into their notebooks.
讲座结束后，学生们把黑板上的笔记抄到了笔记本里。
The school decided to replace all the chalkboards with whiteboards.
学校决定将所有的黑板换成白板。
The child drew a rainbow and sunflowers on the chalkboard with colorful chalk.
这个孩子用彩色粉笔在黑板上画了一道彩虹和向日葵。
During the meeting, the presenter used the chalkboard to illustrate her points.
在会议中，演讲者利用黑板来阐述她的观点。
The math teacher erased the incorrect equation from the chalkboard and rewrote it correctly.
数学老师擦掉了黑板上错误的等式，然后正确地重写了一遍。