您要查找的是不是：
- black ballpoint pen inks 黑色圆珠笔油墨
- The essay was expected to fetch up to US$700 at the auction* and is written in black ballpoint pen on both sides of the paper. 这篇用黑色圆珠笔写的文章长达一页，预计能在12月4日的拍卖中以700美元的价格被拍下。
- The essay is expected to fetch up to $US700 at the auction, which takes place on December 4, and is written in black ballpoint pen on both sides of the paper. 这篇用黑色圆珠笔写的文章长达一页，预计能在12月4日的拍卖中以700美元的价格被拍下。
- Analysis of Writing Age of Ballpoint Pen Ink by Thin-Layer Chromatography 薄层色谱法分析圆珠笔色痕形成时间
- I changed the ink cartridges in my ballpoint pen. 我换了圆珠笔里的墨水芯。
- Determination of Writing Age of Blue Ballpoint Pen Inks by High Performance Liquid Chromatography 高效液相色谱法鉴定蓝色圆珠笔油墨字迹的书写时间
- Determining the Differentiation of the Species of Ballpoint Pen Inks by Reversed Phase HPLC 反相HPLC法鉴别蓝圆珠笔油墨的种类
- Analysis of Ballpoint Pen Inks' Handwriting for the Forensic Differentiation with High Performance Liquid Chromatography 溶剂浮选分离富集麻黄草中有效成分
- It was only blue ink (ballpoint pen) on slightly yellow paper. 这仅是用蓝色的原子笔画在淡黄色的纸上而已。
- Study of identifying the categories and the writing age of ballpoint pen ink by GC 气相色谱法鉴别圆珠笔油墨种类及其字迹形成时间的研究
- Can you give me two refill of each color for the ballpoint pen? 能不能请价钱给这支圆珠笔每种颜色配两根替换笔芯？
- Artificial marking courses with a blue or black ink pen, ballpoint pen or answer the question (with the exception of the special requirements, such as mapping title). 人工评卷类课程用蓝色或黑色墨水的钢笔、圆珠笔或签字笔作答（有特殊要求的除外，如作图题）。
- OPTIMIZATION OF THE BUFFER SYSTEM FOR THE CAPILLARY ELECTROPHORESIS ASSAY OF BLUE BALLPOINT PEN INK WITH ORTHOGONAL DESIGN 正交法优化分析蓝色圆珠笔油墨的缓冲体系
- You can buy the ballpoint pen anywhere. 你到哪儿都能够买到这种圆珠笔。
- May I borrow your ballpoint pen? 你答应了,就可以回答?
- A ballpoint pen is always used to do his exercises. 他的作业总是用圆珠笔做。
- She said that she needed a ballpoint pen. 她说她需要一枝圆珠笔。
- Pick up the red ballpoint pen with your left hand. （用左手拿起红色圆珠笔。）
- Miss Grant:Whose ballpoint pen is this? 格兰特小姐:这是谁的圆珠笔?
- The PIXE was used in analysis of the widely used blue and black ball-point pen inks for the first in forensic science. 摘要在国内首次应用质子激发X射线荧光法对常见的书写字迹进行刑事检验分析，确认PIXE技术可以作为文件检验当中字迹同一认定的有效方法。
