解释下词组在句子中的意思，外贸英语，

这是我们500台计算的正式订单 official trial order哪个是词组. 作为一个特例.If you are willing to buy the whole lot once and for all ，单价分别为5美金和6美金，FOB上海 Case 323.This is our official trial order for 500 computers.We wish to order from you your products as pro-ov purchase. 我们希望就贵司的产品作为正式采购向贵司下订单 pro-ov 320.We’d like to place a order with you for 1000 cases each of No77 and 100 at 5$ and 6$ /Case FOB Shanghai. 我们将向你订购编号77和100各1000件，我们可能会成交 by say在句中是什么意思，我们同意你方的D/P付款条件，但仅有一次 special accommodation金山词典翻译是特殊照顾，这里怎么解释是特例 312259.The sugar of French-made has been sold at level 98$ per long ton ,if you can reduce your limit by say 8% we might come to terms. 法国产的粮已经卖到每长吨98美金，如果你能降价8%.A discount of 5% maybe allowed if the quantity for each specification is more than 1000 cents？ 272,we can grant you a discount of 8% on the price. 若你能一次买一整套或更多，我们同意在价格上给你8%的折扣 whole lot 310.As a special accommodation we are agree to your D/P payment terms, but only for once. 若每一规格的数量超过1000分的话，5%的折扣可能被允许 cents 281

专门的意思

320 5$ and 6$ /Case 每件5美金和和每件6美金，（也就是单价分别为5美金和6美金）case是箱 或件，

323 official trial是一个词组 正式的意思。 order 是订单.. by 是一个词组来的：降价幅度为，say 是 比如说

272 cents 是公分（厘米）的意思，

281 the whole lot 全部 整套

310 special accommodation在付款方式上给与特殊照顾，就等于是特例丫。

312pro-ov 正式：reduce.259

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