Question

alpha

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al∙pha / ˈælfə ; ˈælfə /
◙noun [C usually singular]
1. the first letter of the Greek alphabet
• 希腊字母表的第一个字母
2. the alpha and omega, [formal] the start and finish of something, and therefore the whole of it
• 首尾，始终; 全部:
 »Collective bargaining was viewed as the alpha and omega of trade unionism.
  集体谈判被视为工会主义的全部法宝。