“高峰期”的英语可以翻译为：fastigium ...

我出生在战后的生育高峰期。I'm a product of the postwar baby boom.赶在高峰期开始前申请。Apply before the rush starts.上午8、9点钟之间是交通高峰期。Traffic reaches its peak between 8 and 9 in the morning....