黑板的英文：
blackboard

The chalk jarred against the blackboard
粉笔写在黑板上发出吱吱的声音。

The chalk jarred against the blackboard.
粉笔在黑板上发出吱吱声。

On the blackboard in our class there would be written everyday that there were X number of days left until the exam.
我们班的黑板上，天天写着离中考还有几天几天了。

Point to the blackboard.
指着黑板。

"Blackboard" is a compound word.
“黑板”是一个合成词。

There’re several titles of the composition on the blackboard
黑板上有好几个作文题目

The blackboard is in the front of the classroom.
黑板在教室的前面。

A BlackBoard that rubs clean easily.
很容易擦干净的黑板

Please look at the blackboard and read after me.
请看黑板，跟我读。

Copy (sth.) down (from the blackboard)
将(...)(从黑板上)抄下来

The professor wrote an equation on the blackboard.
教授在黑板上写了一个等式。

The teacher erased the letters on the blackboard.
老师擦掉了黑板上的字母。

There’re several titles of the composition on the blackboard
黑板上有好几个作文题目

Chalk down the song on the blackboard, please.
请把这首歌抄在黑板上。