中美洲区域的老龄化: ageing health and well-being in the central american region
劳动力: 1.(人力) labour force; work force; labour 短语和例子劳动力不足 short of manpower; shorthanded; 劳动力费用低廉 low-paid labour; 调剂劳动力 adjust the use of the labour force2.(劳动能力) capacity for physical labour 短语