S1: Nothing is free.
S2: Please pay the sample charge. S3: Samples will be sent free of charge. S4: We can not send you free samples. S5: Both the samples and postage are free. S6: We can give you two free samples.

没有什么是免费的。
请付样品费。 样品将免费寄送。 我们没办法免费送你样品。 样品费和邮费全部免费。 我们可以给你两个免费样品。