beforeconj.在 ... 以前pref.在 ... 以前;在..前面adv.以前;以往;之前
before you could极快地
before the floodadv.大洪水之前(远古以前;很古)
Before the Crash在坠毁前
before months of在 ... 几个月以前
before proceeding首先
before liberation解放前
before automation前自动化
before one's time在时代前面;思想过于先进
before the judges出庭
Before earthquake震前