ball·point 
(bôlpoint′)
(bôlpoint′)n.
A pen having as its writing point a small ball bearing that transfers ink stored in a cartridge onto a writing surface.
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| 单词 | ballpoint |
| 释义 | ball·point (bôlpoint′)n. A pen having as its writing point a small ball bearing that transfers ink stored in a cartridge onto a writing surface. |
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