[□] □ □ □
[!□] □ □ □
[□ | □] □ □ □
This suggests perhaps that larger economic forces are affecting native born and immigrant alike and that it is difficult for either group to escape the powerful pull of wider economic effects . They renew themselves , resisting the powerful pull towards differentiation that overcomes more prosaic cells . I marvel at the powerful pull the Scout ethic has on them . " It 's just part of me , " he said , when asked for the exact moment when he felt the powerful pull of electrons in his life . I encourage any of my colleagues who can explain AstraZeneca 's success without admitting the powerful pull of pharmaceutical marketing on physicians ' behavior to respond to this letter .