mail sample

例句：

1. 1. The company sent us a mail sample to show us how it works.
   公司给我们寄来了一份邮件样本，让我们看看它是如何工作的。
2. 2. We received a sample of the new product as a gift.
   我们收到了新产品的样品作为礼物。
3. 3. The manufacturer provided us with a sample of their new product for testing purposes.
   制造商为我们提供了新产品的样品，以便进行测试。