1. During World War II, many braceros were recruited to work in American agricultural fields.
二战期间，许多墨西哥的bracero被招募来在美国的农田里工作。
2. The bracero program was established to alleviate labor shortages in the United States by importing temporary workers from Mexico.
bracero计划是为了从墨西哥进口临时工人以缓解美国的劳动力短缺问题而建立的。