Topics - The Three Mile Island Accident; Famous Buildings: Chrysler Building; quarrel versus argument versus controversy; concerned versus worried; amounted to

　　Words:

　　nuclear reactor

　　core

　　coolant

　　malfunction

　　valve

　　to be exposed

　　guideline

　　to evacuate

　　to commission

　　art deco

　　to rust

　　frieze

　　quarrel

　　argument

　　controversy

　　concerned

　　worried

　　amounted to