6 sentences

1. 封建制度在周代最为完善。

   fēng​jiàn zhì​dù zài Zhōu​dài zuì​wéi wán​shàn.

   The feudal system was most developed during the Zhou Dynasty.

   Source: Dong Chinese Dictionary

2. 陈国是周代的一个诸侯国。

   Chén​guó shì Zhōu​dài de yī gè zhū​hóu​guó.

   Chen was a vassal state during the Zhou Dynasty.

   Source: Dong Chinese Dictionary

3. 在周代，采邑是卿大夫的封地。

   zài Zhōu​dài, cài​yì shì qīng​dà​fū de fēng​dì.

   In the Zhou Dynasty, a fief was land granted to a high official.

   Source: Dong Chinese Dictionary

4. 曹国是周代的一个诸侯国，后来被宋国兼并。

   Cáo​guó shì Zhōu​dài de yī gè zhū​hóu​guó, hòu​lái bèi Sòng​guó jiān​bìng.

   Cao was a vassal state during the Zhou Dynasty, later annexed by the State of Song.

   Source: Dong Chinese Dictionary

5. 一些学者主张复古，试图恢复周代的礼乐制度。

   yī​xiē xué​zhě zhǔ​zhāng fù​gǔ, shì​tú huī​fù Zhōu​dài de lǐ​yuè zhì​dù.

   Some scholars advocate archaism, attempting to restore the rites and music system of the Zhou Dynasty.

   Source: Dong Chinese Dictionary

6. 在周代，君子这一称呼最初是指具有高贵地位的统治者。

   zài Zhōu​dài, jūn​zǐ zhè yī chēng​hu zuì​chū shì zhǐ jù​yǒu gāo​guì dì​wèi de tǒng​zhì​zhě.

   During the Zhou Dynasty, the term 'Junzi' originally referred to rulers of noble status.

   Source: Dong Chinese Dictionary