1.mass-market 畅销量大的

例句:They mass-market their haute couture.
他们大量产销他们的高级服装。

2.hitherto 迄今；至今

例句:The polytechnics have hitherto been at an unfair disadvantage in competing for pupils and money
到目前为止，理工专科学校在争取生源和资金方面一直处于劣势。

3.turn back 阻挡；返回

例句:The administration has now endorsed the bill and can't turn back.
政府部门如今已经签署了那项法案，没有挽回的余地。

4.carbon fibre 碳纤维

例句:In its untreated state the carbon fibre material is rather like cloth.
原始的碳纤维材料很像布料。