您要查找的是不是：
- 4-b]哌嗪（DNFP）4-b ] piperazine (DNFP)
- 哌嗪piperazidine
- 用4乘以10multiply 10 by 4
- 2加2得4。Add 2 and 2 to get 4.
- Ｎ－苯基哌嗪N-phenylpiperazine
- 乘4two by four 2
- 苯基哌嗪phenylpiperazine
- 一月差4天a month less 4 days
- 苯甲哌嗪Marzine
- 以4乘9。to multiply 9 by 4 .
- ２，５－哌嗪二酮2,5-piperazine-dione
- 异形4Alien Resurrection
- 正方形可定义为具有4条等边的矩形。A square may be defined as a rectangle with four equal sides.
- 2除8等于4。Eight divided by two is four.
- 4分钟走1英里 。to do a mile in four minutes.
- 早餐要花4英镑。Breakfast cost four pound.
- 是4的两倍。Eight is the double of four. 8
- 连续4天for four consecutive days
- 这两对夫妇4人一行，一起去度假了。The two couples made a foursome and went on holiday together.
- 那样的话，你出差不会超过4天吧?In that case you will not stay longer than four days?
