1. They are maybe be understood as imaginary number i. Imaginary number is not also understood in entity space, but understood theoretically and imaginatively. 也许可以象理解虚数i一样来理解0、∞，虚数也不是在实体空间来理解的，也是在理论上和想象中理解的。
2. Can you imagine / an imaginary menagerie manager / imagining managing an imaginary menagerie? 你能想象一个虚构的动物管理员管理一个虚构的动物园？
3. Based on the number set, a new commutative semi-group is established in the integer number and extended in number fields of rational number, real number and the complex number. 在数集的基础上，在整数域上建立了一个新的交换半群，并在有理数域、实数域和复数域上进行了推广；
4. Based on the number set, a new commutative semi-group is established in the integer number and extended in number fields of rational number, real number and the complex number. 在数集的基础上，在整数域上建立了一个新的交换半群，并在有理数域、实数域和复数域上进行了推广；
5. You who see can spend a lot fruitful days tITe, but I with my imaginary Number 3 days of sight, have to only get a hasty glimpse, and pass on. 那里，确是利用你的眼睛的地方，你们能看见的人能在那里度过许多成果丰硕的西方全国全国日常表达，可是我只有想象的3天可见的时间，只能是仓促地一瞥，匆匆而过。
