These trousers are on sale at twenty yuen for each
B. 这家商店的物品以很优惠的价格在卖翻译
这家商店的物品以很优惠的价格在卖
The items of this shop are selling at a very favorable price
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C. 这些衣服正在降价销售 英语
降价有几种说法：
1 on sale
2 sell at a reced price
3 at a discount
这些衣服正在降价销售，可以说：
These clothes are on sale.
这些衣服前几天在降价销售
These clothes were on sale several days ago.
或者These clothes were sell at a reced price.
如果有具体折扣，就用discount~
希望回答对你有帮助
D. 我们有各种颜色的裤子在减价销售 用英语怎么说
We have trousers in all colours on sale.
E. 这家书店的一些书在降价销售 英语翻译
Some books are on sale in this bookstore.
F. 这家商店的物品以很优惠的价格在卖。这句话用英语这么说
the price of this store's things are on sale
G. 这个商店的衣服在降价销售一切商品都是半价英语
答案：on sale．根据中英文对照，这里需要译出降价销售，用短语be on sale，故答案是on sale．
H. 这家商店以优惠价出售商品 英语怎么说
This shop sells commodities at a preferential price.
I. 你们的白色短裤降价销售吗【英语, 英语怎么说
Are your white shorts on sale?
J. 这家商店在降价出售多种甜品.【汉译英】
这家商店在降价出售多种甜品.
Various dessert is on sale in the store.
The store is selling various dessert with a discount.
以上翻译均可.
不明白可继续提问,