before and after
英
美
- 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
- Vial is Completely Empty Before &After!
小瓶是完全空白的前后!
- They were compared before and after treatment.
比较治疗前后上述指标的变化。