ballpoint pen
US /ˈbɑːl.pɔɪnt ˌpen/
UK /ˈbɑːl.pɔɪnt ˌpen/
1.
bút bi
a pen with a writing point that consists of a small metal ball that rotates in a socket and feeds ink from a reservoir
:
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Please sign the document with a ballpoint pen.
Vui lòng ký tài liệu bằng bút bi.
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I prefer writing with a ballpoint pen over a fountain pen.
Tôi thích viết bằng bút bi hơn bút máy.