Hiding in the fields - farm workers fearing deportation stay in California's shadowsBBC新闻：一名女子跪在地上，头戴紫色头巾，脸上蒙着帽子。她躲避着美国移民局的追捕 ...

"Immigrants play a huge role in the California economy," USA Today on Friday quoted Giovanni Peri, an economics professor at the University of California, Davis, as saying. Without immigrants, "there ...