8 sentences

1. 我收到了一封重要的信件。

   wǒ shōu​dào le yī fēng zhòng​yào de xìn​jiàn.

   I received an important letter.

   Source: Dong Chinese Dictionary

2. 他手里拿着一叠厚厚的信件。

   tā shǒu lǐ ná zhe yī dié hòu hòu de xìn​jiàn.

   He was holding a thick stack of letters.

   Source: Dong Chinese Dictionary

3. 此地路途辽远，信件要走很久。

   cǐ​dì lù​tú liáo yuǎn, xìn​jiàn yào zǒu hěn jiǔ.

   The distance is vast, and letters take a long time to arrive.

   Source: Dong Chinese Dictionary

4. 信件通过古代的驿传系统进行递送。

   xìn​jiàn tōng​guò gǔ​dài de yì zhuàn xì​tǒng jìn​xíng dì​sòng.

   Letters were delivered through the ancient courier system.

   Source: Dong Chinese Dictionary

5. 他把那叠秘密信件掩藏在书架的最底层。

   tā bǎ nà dié mì​mì xìn​jiàn yǎn​cáng zài shū​jià de zuì dǐ​céng.

   He hid the stack of secret letters at the bottom of the bookshelf.

   Source: Dong Chinese Dictionary

6. 谢谢您在百忙之中抽出时间回复我的信件。

   xiè​xie nín zài bǎi máng zhī​zhōng chōu​chū shí​jiān huí​fù wǒ de xìn​jiàn.

   Thank you for taking some time out of your busy schedule to reply to my letter.

   Source: Tatoeba

7. 这封精美的跨国信件是从阿尔巴尼亚寄来的。

   zhè fēng jīng​měi de kuà​guó xìn​jiàn shì cóng ā'ěr​bā​ní​yà jì​lái de.

   This exquisite international letter was sent from Albania.

   Source: Dong Chinese Dictionary

8. 为了不让秘密泄露，他把那封重要的信件彻底撕碎了。

   wèi​le bù ràng mì​mì xiè​lù, tā bǎ nà fēng zhòng​yào de xìn​jiàn chè​dǐ sī​suì le.

   To prevent the secret from leaking, he tore that important letter to shreds.

   Source: Dong Chinese Dictionary