特定 + 的 + Noun
The adjective 特定 (tèdìng) means "specific," "particular," or "designated." It is placed before a noun to indicate that something is defined or singled out rather than general or random, as in 特定种类 (specific types) or 特定条件 (specific conditions).
这项规定只适用于特定的人群。
Zhè xiàng guīdìng zhǐ shìyòng yú tèdìng de rénqún.
This regulation only applies to a specific group of people.
你需要在特定的时间和地点领取证件。
Nǐ xūyào zài tèdìng de shíjiān hé dìdiǎn lǐngqǔ zhèngjiàn.
You need to pick up your documents at a specific time and place.
这种药物只对特定种类的细菌有效。
Zhè zhǒng yàowù zhǐ duì tèdìng zhǒnglèi de xìjūn yǒuxiào.
This medication is only effective against specific types of bacteria.