He's selling his ties at a10% discount below the normal retail price.
他按比通常售价低10%的价格出售他的领带。
These biros retail at/for 70p.
这些圆珠笔零售价为70便士。
Not yet. Personally, I consider the fashions I saw unlikely to sell well in the retail trade.
还没呢。我个人认为我见到的时装款式不太可能在零售业中销售得好。