他们正在白板上分享想法。

They are sharing ideas on the ___whiteboard.

会议结束后，请记得擦掉白板上的所有内容。

Please remember to erase everything on the ___whiteboard after the meeting.

我们可以在在线课程中使用虚拟白板来画图表。

We can use the ___whiteboard in our online class to draw diagrams.