5 sentences

1. 古代社会存在着森严的等级制度。

   gǔ​dài shè​huì cún​zài zhe sēn​yán de děng​jí zhì​dù.

   A strict hierarchy existed in ancient society.

   Source: Dong Chinese Dictionary

2. 古代社会的等级制度极其森严，不容僭越。

   gǔ​dài shè​huì de děng​jí zhì​dù jí​qí sēn​yán, bù róng jiàn​yuè.

   The social hierarchy in ancient times was extremely strict and could not be transgressed.

   Source: Dong Chinese Dictionary

3. 在那个等级森严的社会，这被视为下流职业。

   zài nà​gè děng​jí sēn​yán de shè​huì, zhè bèi shì​wéi xià​liú zhí​yè.

   In that strictly hierarchical society, this was considered a lowly profession.

   Source: Dong Chinese Dictionary

4. 由于防备森严，小偷始终没能得手。

   yóu​yú fáng​bèi sēn​yán, xiǎo​tōu shǐ​zhōng méi néng dé​shǒu.

   The thief never succeeded because of the heavy security.

   Source: Dong Chinese Dictionary

5. 由于有重要首脑出席，会场的戒备非常森严。

   yóu​yú yǒu zhòng​yào shǒu​nǎo chū​xí, huì​chǎng de jiè​bèi fēi​cháng sēn​yán.

   Due to the presence of important leaders, security at the venue is very tight.

   Source: Dong Chinese Dictionary