他会看到我不是那么容易被替代的。He would see I was not so easily replaceable.实践经验是无法替代的。There is no substitute for practical experience.它们是独一无二、不可替代的无价之宝。They are priceless, unique and irreplaceable....
Shoes are only sold in pairs.鞋论双卖.The children came in pairs.孩子们两个两个地进来.Little shop - girls went fluttering by in pairs and fours , chattering, laughing.年轻的女店员三三两两蹦蹦跳跳从身边走过, 一边走一边说笑着....