sub-：under，below；less important；part of the stated bigger whole

　　divide——subdivide

　　section——subsection

　　super-：more，larger，greater than usual

　　market——supermarket

　　natural——supernatural

　　tele-：at or over a long distance；by or for television

　　communication——telecommunication

　　screen——telescreen

　　therm(o)-：concerning heat

　　chemistry——thermochemistry

　　meter——thermometer

　　trans-: across，on or to the other side of ; between

　　Atlantic—transatlantic

　　plant—transplant

　　tri-: three; three times

　　angular—triangular

　　cycle—tricycle

　　ultra-: beyond; very，extremely

　　modern—ultramodern

　　sound—ultrasound

　　un-: not

　　certain—uncertain

　　fortunate—unfortunate

　　under-: too little; below

　　develop—underdevelop

　　sea—undersea

　　uni-: one，singer

　　form—uniform

　　directional—unidirectional

　　vice-: next in the rank; below

　　chairman—vice-chairman

　　president—vice-president