求翻译：许多原来因为本地经济不发达、就业机会少、工资低而外出打工的农民工回到了当地高速公路建设工地就业，同时还通过工程建设锻炼培养造就了一大批工程建设技术工人，如钢筋工、隧道掘进工、爆破工等。是什么意思？

Many of the original because of the underdeveloped local economy, less job opportunities, low wages, migrant workers, migrant workers back to the local highway construction site of employment, the exercise by the project construction cultivate a large number of skilled workers on construction projec

Many of the original due to the fact that local economic underdevelopment, less jobs, low-wage workers out of the inside-out workers to return to the local highway construction employment, while also cultivating a construction of the project work was construction of the project a large technical wor

Many because originally the local economy not developed, the employment opportunity few, the wages lowered the peasant laborer who egressed works to return to the local highway construction work site employment, meanwhile exercised the raise through the engineering construction to accomplish a large

Many as underdeveloped local economy, employment opportunities, low wage migrant peasant workers to return to the local highway construction job site, as well as by construction exercise training and bringing up a large number of construction workers, steel workers, tunneling, Blaster, etc.

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