例句與造句

1. The falling ratios between 1920 and 1970 led to delayed marriage [ see “ a surplus of women , ” by the numbers , april 2004 ]
   男女比例在1920 ~ 1970年代間出現(xiàn)下滑現(xiàn)象，導(dǎo)致人們晚婚（請參見2004年5月號新聞掃描高學(xué)歷，低結(jié)婚率？
2. It's difficult to find fall ratio in a sentence. 用fall ratio造句挺難的