The quality of hearth roll of continuous annealing furnace is one of major factors that affect workrates and surface quality of products.
硅钢连续退火炉的炉底辊质量是影响作业率和产品表面质量的主要因素之一。
2
Falls in marginal tax rates in America since the 1970s have made it all the more profitable to work longer.
自20世纪70年代以来，美国边际税率的下降使得延长工作时间更有利可图。
3
Unemployment rates for Americans nearing retirement are far lower than those for young people, who are recently out of school, with fewer skills and shorter work history.