“风华正茂”常见的英文表达是 “in the prime of one's youth/life” 或 “at the height of one's vigor/youth”，也可用 “full of youthful spirit and promise” 来传达其积极向上的青春风采之意。以下为具体说明：
“in the prime of one's youth/life”：
含义：指处于人生中最美好、最有活力的时期，强调青春和活力。
例句：He was in the prime of his youth when he decided to pursue his dream of becoming a writer.（他在风华正茂的年纪决定去追求成为作家的梦想。）
“at the height of one's vigor/youth”：
含义：表示处于精力或青春的巅峰状态，突出活力和朝气。
例句：At the height of her vigor, she accomplished many great things.（在她风华正茂的时候，她取得了许多伟大的成就。）
“full of youthful spirit and promise”：
含义：侧重于表达充满青春的精神和潜力，有一种积极向上的感觉。
例句：The young team is full of youthful spirit and promise, ready to take on any challenge.（这支年轻的队伍风华正茂，充满潜力，随时准备迎接任何挑战。）