1 . 前
the earthquake was predicted several weeks ago., 幾周前就預告要發生地震.
2 . 以前
1051 visit v 參觀,訪問,拜訪1052 agoadv 以前1053 the day before yesterday phr 前天
3 . 之前
...[化學]使老化;使陳化;使熟化;估計,推測(馬的年齡)agoadv. 以前;過去的;之前ah int. 啊
4 . 前所
eight years ago, the biggest earthquake ( Richter scale 7.3 ) resulted in many casualties : 2832 persons died , 4460 persons were wounded , 2615 persons were in danger and waiting for rescue .是八年前所發生7.3級的最大規模的地震,那時候全臺灣累計死亡人數已達2832人,受傷4460人,2615人在受困等待救援。