어떤 단어든 아래 칸에서 찾아보세요. 예를 들면 "sex"
 
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Science so complicated one needs to use calculus most of the time to express concepts. From the "sigma" letter in calculus, the symbol that is used to express summation.
Quantum physics is a sigma science.
pentozali가 작성 2008년 05월 01일 (목)

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