그만두다; to avoid doing it

(a)  

많은; many of those things

(a)  

검토; a formal inspection of it by people in authority

(a)  

펼리한; useful

(a)  

정교한; they know many things about the world

(a)  

십년간; period of ten years

(a)  

격리하다; to separate one person or thing from a group

(a)  

똑바로; to stand up straight

(a)  

할 보람 있는; it is important or useful

(a)  

항복; to give up

(a)  

to put them into groups based on their type

(a)  

나룻배; a boat that carries passengers over short distances

(a)  

도표; a simple drawing that explains what something is or how it works

(a)  

admit that something is true against your wish ;인정하다

(a)  

건설하다; to make or build it

(a)