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before-and-after
 before and after
gen. 前后
| test
 test
gen.
archit. 试 验; 测验; 检査; 准则; 试验品; 试验方法

to phrases
before and after
gen. 前后
tech. 前后效果对比
before-and-after: 20 phrases in 8 subjects
Agriculture1
Business3
Computers1
Economy2
General1
Information technology1
Rail transport1
Technology10