介绍:
1. Two for one.
买一赠一。
2. Buy two, get one free.
买二赠一。
3. With each shirt you get a gift of a pair of socks.
买一件衣服，送一双袜子。
4. Welcome to try our cake for free.
欢迎免费品尝我们的蛋糕。
5. Please have a taste of our free sample.
请尝尝我们的免费样品。
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