Part V Translation (3x5=15 points)
Directions: Translate the following underlined sentences into Chinese.
76.If you want to study English well. you have to keep quite a few English words in your mind.
77.This does not mean that all people are less intelligent in the summer than they are during the rest of the year.It does mean,however, that the mental abilities of large numbers of people tend to be lowest in the summer.
78.Why don't birds get lost on their long flights from one place to another? Scientists have puzzled over this question for many years,. Now they re beginning to fill in the blanks.
79.His name and his great contributions as well never fade from ourmemory.
80.We must take measures to prevent youths and children from committing crimes as much as possible.