mechanical pencil
noun/məˌkænɪkl ˈpensl/
/məˌkænɪkl ˈpensl/
(North American English) (British English propelling pencil)
- a pencil with a lead that can be moved down for writing by turning or pushing the top of the pencil
自动铅笔：带铅芯的铅笔，可通过转动或推动铅笔顶部向下移动以进行书写