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- 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。
- 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
- 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
- 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。
- 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？
- Ballpoint pen ink 圆珠笔油墨
- 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?
- Inscribed lower left in ballpoint pen: Stefan! 左下刻在圆珠笔:斯特凡!
- The ballpoint pen was invented by Biro. 圆珠笔是由拜罗发明的。
- Each CFL contains about five milligrams of mercury, about equal to the amount of ink on the tip of a ballpoint pen. 每个CFL约含五毫克的水银，与原子笔尖墨水的含量大致相同。
- In Harare, one man said he had not voted at all and instead smeared his finger with ink from a ballpoint pen. 在哈拉雷，一名男子说他根本没投票，而是在手指涂上了圆珠笔墨水。
- I rummaged all the drawers before I found my ballpoint pen. 我翻遍了所有的抽屉才找到我的圆珠笔。
- 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
