the most extreme possible amount or value

同义词：extremum

the period of greatest prosperity or productivity

同义词：flower??/??prime??/??heyday??/??bloom??/??blossom??/??efflorescence??/??flush

the highest level or degree attainable; the highest stage of development

同义词：acme??/??height??/??elevation??/??pinnacle??/??summit??/??superlative??/??meridian??/??tiptop??/??top

the top point of a mountain or hill

同义词：crown??/??crest??/??top??/??tip??/??summit

a V shape

同义词：point??/??tip

the highest point (of something)

同义词：vertex??/??apex??/??acme

a brim that projects to the front to shade the eyes

同义词：bill??/??eyeshade??/??visor??/??vizor

to reach the highest point; attain maximum intensity, activity

of a period of maximal use or demand or activity