2 sentences

1. 信封上印有“航空”字样。

   xìn​fēng shàng yìn​yǒu“ háng​kōng” zì​yàng.

   The words 'By Air' are printed on the envelope.

   Source: Dong Chinese Dictionary

2. 这种字样常用于古籍印刷。

   zhè zhǒng zì​yàng cháng​yòng yú gǔ​jí yìn​shuā.

   This type of script is often used for printing ancient books.

   Source: Dong Chinese Dictionary