the first half of one´s life
You can sigh away half your youth if you choose to allow failed relationship to sadden you.
如果你陷于失败的伤感中,你就会使前半生在叹息中度过。
—— 给力词典精选Each person´s life, the former half - to attack, and the second to abide by.
每个人的一生, 前半生要攻, 后半生要守。
—— 给力词典精选His political career and his thoughts changed very greatly during his earlier life.
他前半生政治生涯及其思想前后变化很大。
—— 给力词典精选