英语长句求教大神指点一二itmadegoodsensetothousandsofpeasantfamiliestoineffeceworkful-timeatwhattheyhadbeenabletodoonlypart-timepreviouslybecauseoftherequirementtoworkforthegovernment:growriceforthemark
英语长句求教大神指点一二
itmadegoodsensetothousandsofpeasantfamiliestoineffecework
ful-timeatwhattheyhadbeenabletodoonlypart-timepreviously
becauseoftherequirementtoworkforthegovernment:growriceforthe
marketplace
这句话里的atwhattheyhadbeenabletodoonlypart-timepreviously修饰哪一个部分?