导购口语:

Most biscuits are vacuum-packed to keep them fresh.
大部分的饼干式真空包装的，以保持新鲜。
The feature of our pastry is that it contains no grease and tastes good.
本店糕点特色：不含油脂，口味棒。
Chocolate-covered wheat toasts are healthy and nutritious.
涂有巧克力的烤全麦面包片既有利于健康又有营养。

语句解析:

Keep fresh保持新鲜；contain no grease不含脂肪，grease意为“油脂”；chocolate-covered wheat toasts涂有巧克力的烤全麦面包片，toast意为“土司，烤面包片”。

情景再现:

It's too dear. Can you take off a little?
太贵了，可以便宜点儿吗？
If I buy two of these, can I avail of special discount?
如果我买两盒，可以享受特价优惠吗？
Could you give me some advice in buying Chinese pastry here?
能给我点建议买什么中式点心好吗？
I want a Big Mac, a small order of French fries and medium coke.
我要一个巨无霸，一份炸薯条，一个中杯可乐。