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1·What is it? It is a blackboard.

这是什么？这是一块黑板。

2·John saw a blackboard with a note written on it.

约翰看到一块黑板，上面写着一条留言。

3·He showed up at Zeng's home the next day with a blackboard, a ruler and a box of chalks.

第二天，他带着一块黑板、一把尺子和一盒粉笔来到曾的家里。

4·Here is a blackboard and two fans.

这有一块黑板，两台电扇。

5·Here are some desks and a blackboard.

这有一些课桌和一个黑板。

6·There is a teacher's desk and a blackboard.

那里有一个老师的课桌和一块黑板。

7·My cousin and cousin both a blackboard, I a whiteboard, ah!

表哥和表姐俩都出黑板，我出了白板，啊！

8·Singaporean head chef Tommy Teh Kum Chai offers daily specials on a blackboard, rather than sticking to a menu.

新加坡厨师长 Tommy Teh Kum Chai 提供每日的特色菜，并写在黑板上，没有固定的菜单。

9·The menu was on a blackboard.

菜单在黑板上。《柯林斯英汉双解大词典》

10·On a blackboard, he drew five concentric circles.

他在黑板上画出五个同心圆。《柯林斯英汉双解大词典》