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- 二维Volterra互惠系统2-D Volterra cooperative system
- Lotka-Volterra互惠系统Lotka - volterra mutually system
- 变时滞Lotka-Volterra互惠系统Lotka-Volterra mutualism system with delays
- 二雏Volterra互惠系统2 - D Volterra cooperative system
- 二two
- 二雏结构two-dimensional structure
- 二雏模糊数Two-dimensional Fuzzy Number
- 二雏平面展开Two-dimensional plane stretching
- 互惠系统Cooperative system
- 二雏随机变量two-dimensional random variable
- 生态系统ecological system
- 雏chick
- 二号2nd day of the month
- 免疫系统immunologic system
- 二楼second floor
- 关于互惠系统的捕获优化问题Optimal Harvesting Control Problem of Mutually Beneficial System
- 二次adratic quadrate
- 二等second-class
- 电力系统electric power system
- 大二学生sophister
