... 余割 = cosecant 余割 = cosecants 余悸 = lingering fear ...
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同义词: cosec
以上来源于: WordNet
N (of an angle) a trigonometric function that in a right-angled triangle is the ratio of the length of the hypotenuse to that of the opposite side; the reciprocal of sine 余割 ( abbr: cosec)
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