单词	square root
释义	square root A square root of a real number a is a number x such that x2 = a. If a is negative, there is no such real number. If a is positive, there are two such numbers, one positive and one negative. For a ≥ 0, the notation is used to denote quite specifically the non-negative square root of a. For complex numbers, square root is a multifunction so that a branch needs to be chosen.
随便看	embedding empirical empirical probability empty set emv emv algorithm En encrypt End endomorphism end‐point energy energy equation enneagon entering variable entire function entropy entry Entscheidungsproblem enumerable enumeration envelope envelope paradox epicycloid epidemiology

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