Analysis by David Autor indicates that from 1999 to 2007, low-skill jobs grew substantially as a share of all jobs in the United States.

大卫·奥特所作的分析报告指出，从1999年到2007年，低技能的工作在美国所有工作中所占份额显著增长。

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Analysis by David Autor indicates that from 1999 to 2007, low-skill jobs grew substantially as a share of all jobs in the United States.

大卫·奥特所作的分析报告指出，从1999年到2007年，低技能的工作在美国所有工作中所占份额显著增长。

youdao