alpha and omega
始終,全部;主要部分
o·me·ga n.
1. The last letter of the Greek alphabet. See Alpha.
2. The last; the end; hence, death.
=\“Omega! thou art Lord,” they said.\= --Tennyson.
Alpha and Omega, the beginning and the ending; hence, the chief, the whole.
The alpha and omega of science. --Sir J. Herschel.
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alpha and omega
n 1: the first and last; signifies God's eternity
2: the basic meaning of something; the crucial part