I do not recall any formal training, just endless work and an unending stream of people!我想不起有过任何正式培训, 只有做不完的工作和无穷无尽的人流！

the country's seemingly unending cycle of political violence这个国家似乎永无休止的政治暴力循环

a source of unending pleasure and delight愉快与欢乐的无尽源泉