New competitors are emerging to challenge the old economic arrangements. 新的競爭對手正在崛起，向舊的經(jīng)濟布局挑戰。
I am confident they will move the American economy ahead, move it firmly and soundly so that there will never be a time when the Soviet Union will be able to challenge our superiority in this field. 我確信這些建議能把美國經(jīng)濟推向前進(jìn)，使之穩步而合理地發(fā)展、讓蘇聯(lián)在經(jīng)濟上沒(méi)有挑戰我們超級大國地位的機會(huì )。
In deference to our host I decided not to challenge his controversial remarks. 我出於對主人的尊敬，不對他那易引起爭論的話(huà)表示異議。
