a pen that has a small metal ball as the point of transfer of ink to paper
造句
用作名詞(n.)
The ballpoint pen was invented by Biro. 圓珠筆是由拜羅發(fā)明的。
You jab your forehead incessantly with a pen in the hope that this will encourage some sort of intelligent thought to flow from your brain to the paper via your biro. 你不停地用筆戳著前額，仿佛這樣就能從大腦中汲取一些靈感，讓它順著圓珠筆流淌到卷面上似的。