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Pre-Listening Vocabulary
- pi (∏): the circumference1 of a circle divided by its diameter
- ratio: the relationship between two amounts
- circumference: the distance around an edge of a circular shape
- diameter: the line across the centre of a circle
- coincidentally: by chance
- theory of relativity: Einstein’s idea that the way that anything (besides light) moves is dependent on the relative movement of the observer
Einstein Was Born On Pi Day-爱因斯坦诞生于圆周率日
Pi Day is celebrated2 on March 14 (3.14), the closest calendar date to the mathematical number “pi”. Pi, named after a Greek letter (∏), is the ratio of a circle’s circumference divided by its diameter. While the exact value of pi is impossible to determine because it goes on indefinitely without making a pattern, it is typically written as 3.14. Some math and science enthusiasts3 celebrate Pi Day with pie-eating contests, while others enjoy pizza (pie) parties! Pi Day originated at a museum in San Francisco in 1988. Coincidentally, March 14 is also Albert Einstein’s birthday. Einstein was a mathematician4 and physicist5 who became famous for his theory of relativity.
1 circumference | |
n.圆周,周长,圆周线 | |
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2 celebrated | |
adj.有名的,声誉卓著的 | |
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3 enthusiasts | |
n.热心人,热衷者( enthusiast的名词复数 ) | |
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4 mathematician | |
n.数学家 | |
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5 physicist | |
n.物理学家,研究物理学的人 | |
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