burden
burden(负担,强调重量/压力使人难以承受:a financial burden = 财务负担;bear the burden = 承担重担)
strain
strain(压力,紧张,强调「拉伸至极限」:the strain of overwork = 过度工作的压力;put a strain on = 给…带来压力;比 burden 更强调「持续拉伸」的紧绷感)
The ageing population is placing an increasing burden on public pension and healthcare systems across developed economies.
人口老龄化给发达经济体的公共养老金和医疗体系带来了越来越大的负担。
The prolonged shortage of qualified nurses is putting enormous strain on hospital staff, leading to high levels of burnout.
合格护士的长期短缺给医院员工带来了巨大的压力,导致高水平的职业倦怠。