"The competition is greater, the pressures on kids have increased dramatically, " said Mel Riddle of the National Association of Secondary School Principals.
“竞争更加激烈，孩子们的压力剧增，”全国中学联合会负责人梅尔.瑞得尔(Mel Riddle)认为。
2
Kathleen Jaeger of America's Generic Pharmaceutical Association adds that branded firms try to extend their lucrative monopolies by filing less rigorous secondary patents designed “to block generics”.
Class distinctions tend to be relatively fixed, although in the city where greater variety is permitted, they are more likely to be secondary determining factors of friendship and association.