您要查找的是不是：
- Penning typeionsource 彭宁离子源, 电子振荡型离子源
- My deskmate wanted to trade his pen for my book. 我的同桌想用他的钢笔换我这本书。
- He made motions to me to pass the pen. 他向我打手势，要我把钢笔递给他。
- Put down my pen and stop fiddling! 把我的钢笔放下，别用手玩弄！
- She delved in her bag and pulled out a pen. 她在提包里翻找，拿出一枝钢笔。
- Charles bought a pen at the dime store. 查尔斯在廉价店买了一支钢笔。
- Somebody has walked off with my pen. 有人把我的钢笔偷走了。
- He is rooting about for his fountain pen. 他正在寻找他的自来水笔。
- I'm wild about losing my gold fountain pen. 我因遗失了自来水金笔而暴躁不安。
- Don't make so much fuss over losing a pen. 别为了丢失一支笔就这样大惊小怪。
- I've searched high and low for my lost pen. 我到处寻找丢失的钢笔。
- That was only a slip of the pen. 那仅是笔误。
- I can't find my pen though I've looked everywhere. 我到处找那支钢笔,可就是找不到。
- I've hunted high and low for the pen. 我已到处寻找过那枝笔。
- She makes a living with her pen. 她靠写作为生。
- The dog chased the sheep into the pen. 狗追赶羊入栏。
- You would write better if you had a good pen. 要是有枝好笔，就能写得更好。
- Laszlo Biro invented the ball-point pen. 拉斯洛·拜罗发明了圆珠笔。
- She fumbled about in her handbag for a pen. 她在手提袋中搜寻钢笔。
- The duke wrote a letter with a quill pen. 公爵用一根羽毛笔写信。
