two dos“两个务必”twonum.二；两个two-scale equations两尺度方程two - stage reactor两段反应器two by four technique“2×4”技术Two-way tree volume二元立木材积Two-level work pool两级工作池two-way interactive双向交互two hundred and fifty(=250) 二百五十two-point regulator两点调节器two-component model二组元模型two-strand exchange双股交换

1. A man without an address is a vagabond; a man with two addresses is a libertine.
   人而无一住址者是为流浪汉，住址有二者是为放荡儿。
2. A man without an address is a vagabond; a man with two address is a libertine.
   人而无一住址者是为流浪汉，住址有二者是为放荡儿。