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lly adv. 經(jīng)濟地 , 經(jīng)濟學(xué)地 important for a country. 2. She rent her house at an____________rent. students should use our money_____________. Economy economic economically vain 徒勞的; 無效的 = vainly 我們想把問題解決,但是沒辦成。 I vainly asked him to help me . 我要求他幫忙,但沒有用。 We tried in vain to work out the problem. 他的努力都白費了。 His attempts were in vain. 7. take a chance/take chances 碰運氣;投機;冒險一試 1) You should never take chances when driving a car. 2) We will take a chance to go across the river. by chance= by accident 偶然,無意 by any chance 萬一 by some chance 由于偶然的機會 Chances are that…(possibilities) 很可能 The bison on the plains of America first settlers on the plains were farmers. Americans willingly gave up land to the settlers. settlers didn’t deal honestly with the Native Americans. ended up with