before and after

英 美
  • 前后
  • after adv.以后;后来conj.在...以后prep.在...之后;在后面;关于;追赶;依照adj.以后的
  • and conj.和;加;接着;那么
  • before conj.在...以前pref.在...以前;在..前面adv.以前;以往;之前
    1. Vial is Completely Empty Before &After!
      小瓶是完全空白的前后!
    2. They were compared before and after treatment.
      比较治疗前后上述指标的变化。