ballpoint pen
noun [ C ] uk/ˌbɔːl.pɔɪnt ˈpen/ us/ˌbɑːl.pɔɪnt ˈpen/ (also ballpoint)
圆珠笔
a pen with a small metal ball at the end that puts ink on the paper
The letter was written in blue ballpoint pen. 这封信是用蓝色圆珠笔写的。
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