Translation of "Blackboard" in Chinese

Look at the blackboard, everyone.

請大家看看黑板。

Ann wrote something on the blackboard.

Ann在黑板上写了些什么。

The sentence on the blackboard was erased.

黑板的句子被抹掉了。

I erased the blackboard for the teacher.

我为老师擦黑板。

Compare your translation with the one on the blackboard.

把你的翻译和黑板上的比较一下。

Compare your sentence with the one on the blackboard.

比較一下你寫的句子和黑板上的句子。

Our math teacher drew a circle on the blackboard.

我们的数学老师在黑板上画了一个圆。

Everyone came to the blackboard to write down their name.

每个人到黑板前写下自己的名字。

Hey, sir, the function on the blackboard is not exponential, but trigonometric.

嗨，先生，黑板上的不是指数函数，而是三角函数。

If someone in the class has a birthday, the teacher always draws a flag on the blackboard.

如果班上有人過生日, 老師總是會在黑板上畫一面旗子。