1.For a time It was a fine theory, and for a time it even worked.Because its meaning is far-reaching, cause the wide attention of maritime bound for a time.一度2. A head start It gives us a decisive head start in a competitive and tough market.Gralg is a slow runner, but he got a head start on others so he might win the race.得先机3. Figurative(used of the meanings of words or text) not literalHere the word is used in a figurative sense.4. Trillion一万亿5. Immense amountsThat saves an immense amount of computation.一大笔6. CharacterizeWhich indicators are selected to characterize the landscape function?
