quadruple 四倍
skilled vocational training courses职业培训课程
skilled vocational diploma 职业培训证书
undergraduate diploma大学毕业证
bachelor’s degree 学士学位证书
postgraduate diploma研究生毕业证
master’s degree 硕士学位证书
expenditure=spending
metro system= underground system=subway system
占比：account for/occupy/constitute/represent
households=family
outnumber比……数量多
outweigh 比……重
outgrow 比……长得快/大
in stark contrast 对比鲜明，非常不一样
whereas=while
marginaly=slightly
boast:有 e.g. France boasted the largest quantity...
equivalent figure该数据
