音标：[ˈinsidənsiz] ；

n. 发生率( incidence的复数形式 ); 影响范围; 发生范围; 影响程度

n. the relative frequency of occurrence of something
n. the striking of a light beam on a surface

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The remote village of Kodinji in southern India, population about 13,500, is home to more than 100 pairs of twins, and 90% of those were born within the last 18 years. No one quite knows why, and no published study explains the phenomenon. At the las

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3-methoxy-4-formylpyridine

baseband transfer function

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