2 sentences

1. 如果收件人不在家，会发生什么？

   rú​guǒ shōu​jiàn​rén bù zài jiā, huì fā​shēng shén​me?

   What happens if the recipient isn’t at home?

   Source: CCMatrix

2. 如果你不太了解收件人，“亲爱的先生/女士”是一个安全的选择。

   rú​guǒ nǐ bù tài liǎo​jiě shōu​jiàn​rén,“ qīn'ài​de xiān​sheng/ nǚ​shì” shì yī​ge ān​quán de xuǎn​zé.

   If you do not know the recipient well, “Dear Sir/Madam” is a safe choice.

   Source: CCMatrix