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- 광전효과,photoelectric_effect
- 극성,polarity
- 부호,sign
- 산화환원반응,redox_reaction
- 양이온,cation
- 이온,ion
- 전원,source
- 축전기,capacitor
- 트랜지스터,transistor
- 퍼텐셜,potential
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