WEICON Pen- System 笔状瞬间粘合剂
Pen-System 瞬间笔状粘合剂
light pen system 光笔系统
fountain pen with self-filling system 自动吸水结构钢笔
light pen control system 光笔控制系统
Dip-pen nanolithography system 沾笔奈米制造系统
Pen tablets system 数位板系统
Instead, to demonstrate the "red effect" I should have used an image of an elderly man solving a system of differential equations using a red pen.
相反，为了证明“红色效应”，我应该使用一张一个老男人用红笔求解微分方程系统的图像。
StudyDroid doesn't do away with this time-tested system, but rids you of the need for pen and paper.
StudyDroid还没有经受时间的考验，但是却可以把你的从笔和纸的世界中摆脱出来。
Self-defense system: When you encounter bad guys, do not panic, do not be afraid, come up with the magic pen, press the black button.
自卫系统：当你遇到坏人时，不要惊慌，不要害怕，拿出神奇的钢笔，按下黑色的按钮。
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