例1. People were afraid to leave their houses, for although the police had been ordered to stand by in case of emergency, they were just as confused and helpless as anybody else.
例2. Modern scientific and technical books, especially textbooks, requires revision at short ◎intervals if their authors wish to keep pace with new ideas, observations and discoveries.
例3. Taking his cue from Ibsen`s A Doll`s House, in which the heroine, Nora, leaves home becauseshe resents her husband`s treating her like a child, the writer Lu Xun warned that Nora would needmoney to support herself; she must have economic rights to survive.
例4. Up to the present time, throughout the eighteenth and nineteenth centuries, this new ◎tendency placed the home in the immediate suburbs, but concentrated manufacturing activity, business relations, government, and pleasure in the centers of the cities.