chalk
Definition
A soft, white, porous limestone used for writing on blackboards or marking surfaces.
中文 一种柔软、白色、多孔的石灰岩，用于在黑板上书写或标记表面。
Example
"The teacher wrote the lesson plan on the board with a piece of white chalk."
A soft, white, porous limestone used for writing on blackboards or marking surfaces.
中文 一种柔软、白色、多孔的石灰岩，用于在黑板上书写或标记表面。
"The teacher wrote the lesson plan on the board with a piece of white chalk."