最新研究發(fā)現(xiàn), "U.S. obesity rates are leveling off after decades of skyrocketing growth," 幾十年急劇攀升后,美國(guó)人的肥胖率開始穩(wěn)定下來。但與此同時(shí),"Although heart disease death rates have been falling in the U.S. for four decades, they are now leveling off for young men and women," 雖然美國(guó)心臟病死亡率四十年來一直下降,但是年輕男性和女性的心臟病死亡率的下降趨勢(shì)正在慢慢停下來。好的,今天我們學(xué)習(xí)的詞是level off...