ballpoint

ballpoint ballpoint pen怎么造句 ball-pen,ballpoint Ballpoint pen的区别求详解 I have bought three ballpoint pens,none of _____writes smoothly. the ballpoint pen was popular soon after it was invented 的翻译 谁能告诉我详细黑色圆珠笔里的化学成分以及what consists of black ink?比如说 carbon black.能给英文的最好 记得是 或者颜料.关键词是 black ballpoint pen/black ink,chemical composition/ pigment 英语翻译By Another One day a young teacher was playing with her five-year-old son.suddenly he grabbed her ballpoint pen and swallowed it.Oh,no!cried the woman.we must find a school doctor. She took her son,ranout of the house,put him in her c 大家帮忙翻译两篇英语短文被...感激不尽...Ballpoint pens have made life easier for millions of people. At one time 26 did not like their students to 27 with them. Perhaps it was too easy. Pens can leak (漏) and it is 28 to spil 英语翻译Ballpoint pens have made life easier for millions of people.At one time 26 did not like their students to 27 with them.Perhaps it was too easy.Pens can leak (漏) and it is 28 to spill (溢出) the ink.And it is hard to write on thin or c