a swap meet for collectors of Star Trek memorabilia《星际迷航》纪念品收藏者交流会He is on a trek through the South Gobi desert.他正徒步穿越南戈壁沙漠。The World Trade Centre is a bit of a trek from Soho, but it's worth it.从苏豪区到世贸中心走起来是有点远，但还是...
Half of the apples are unripe.一半的苹果不熟.I was only ill once and that came of eating an unripe pear.我唯一一次生病是因为吃了未熟的梨。Ripe fruit does not travel well, but unripe fruit can be transported worldwide.熟透的水果不宜长途运输，但未成熟的水果却可以运往全世界...
Purchase tax was not payable on goods for export.出口商品不需要交购买税。The tax increase sounded the death knell for the business.税赋的增加为这个企业敲响了丧钟。Is a tax increase still out of the question?增加税收仍然是不可能的事吗？...