Why Fingernails on Blackboards Sound So horrible?
为什么指甲刮黑板的声音听起来那么膈应？
There is a clock , two blackboards in our classroom.
我们教室有一个钟，两块黑板。
A half-collapsed school is there, desks and blackboards still in place.
一个已一半坍塌了的学校，教室内的桌子和黑板还在原处。
What's in your classroom? There's a bookcase. There are some blackboards.
你们教室里有什么？有一个书橱，有一些黑板。
The process to replace all blackboards with electronic whiteboards can be arduous.
用电子白板取代所有的黑板会是非常困难的。
The process to replace all blackboards with electronic whiteboards can be arduous.
用电子白板取代所有的黑板会是非常困难的。
应用推荐