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Ballpoint pens have made life easier for millions of people. At one time 1 did not like their students to 2 with pen. Perhaps it was because pens can leak(漏) and it is 3 to spill(溢出) the ink. And it is hard to write on thin or cheap paper with them.
Ladislao Biro 4 for a newspaper in Budapest. He spent all day 5 his desk. Day in and day out, he corrected 6 of thin, cheap paper with a pen and ink. He often had to stop to 7 his pen and it did not write 8 on the thin paper. He and his brother George 9 some experiments. They wanted a pen that did not leak, with ink that did not spill. Why not 10 a little ball at the end?
