In one's twenties
几十岁───Decades old;某人───someone
Julia lifted her forearms out of instinct, shut her eyes, and waited for the swift delivery of his decades'-old promise.───朱莉娅本能地举起小臂捂上眼睛，等待他迅速实施二十多年前就威胁要做的事情。
The draconian, decades-old state of emergency must be lifted and with it curbs on freedom of speech and assembly.───持续了几十年、严厉的紧急状态必须被解除，言论及集会自由才有可能被恢复。
Shanghai's nightlife is in the unenviable position of having to live up to its own decades-old reputation.───上海的夜生活处在一个不令人羡慕的位置上，那就是她不能辜负自己几十年的盛名。
His heat pump is relatively new, but the air-handling system is two decades old.
For example, the trade in waste paper and boxboard is in some cases many decades old (e. g. , im ports by the paper industry in India).
More prosaically, some of the electricity for your latest gadget was probably made in a power plant that's decades old.
It does not allow someone to exhume memories that are decades old or to retrace or undo human development.