1. 难得：One good turn deserves another 善有善报 | one in a thousand 难得 | One man's guess is as good as another's 猜测终究是猜测

2. 百里挑一, 杰出的：One down! [美俚]来一份烤面包! 第一个障碍排除了! 第一个项目完成了! | one in a thousand 百里挑一, 杰出的 | one in the eye for sb. 给某人照眼一拳 给某人钉子碰

3. 少有,杰出：ten to one 很可能 | one in a thousand 少有,杰出 | have one thousand and one things to do 日理万机