1. Most car thieves are opportunist unskilled petty criminals; many are under 20. 大多数偷车贼是机会主义者、不熟练的小罪犯；许多人不到20岁。
2. At first, thousands of unskilled laborers were recruited; by the 1730's, however, American employers demanded skilled artisans. 起初，数千名非熟练工人被招募；然而，到了18世纪30年代，美国的雇主需要有技术的工匠。
3. After 1815 this older form of manufacturing began to give way to factories with machinery tended by unskilled or semiskilled laborers. 1815年后，这种古老的生产方式开始让位于那些由无技能或半熟练工人操作机器的工厂。
4. The notion of a sharp division between the working young and the idle old misses a new trend, the growing gap between the skilled and the unskilled. 有工作的年轻人和无所事事的老年人之间存在尖锐分歧这一观点忽视了一个新趋势，即有技能的人和无技能的人之间差距的日益扩大。
5. But the notion of a sharp division between the working young and the idle old misses a new trend, the growing gap between the skilled and the unskilled. 但是，有工作的年轻人和无所事事的老年人之间的尖锐分歧没有考虑一个新趋势，即有技能的人和无技能的人之间差距的日益扩大。
