one and only：
英 [wʌn ænd ˈəunli] 美 [wʌn ənd ˈonli]
唯一的。
例句：
I sent them more than 6,000 cartoons before I had my one and only acceptance bythem
我寄给他们6,000多幅漫画，最后才有1幅得以采用。
《柯林斯高阶英汉双解学习词典》
2 There is one and only one integration stream for a project.
对项目有一个且只有一个集成流。
3 You are my life. You're my one and only dream.
你是我的性命，你是我唯一的梦想。
4 Multiple Tasks can be associated to one and only one Issue.
多个任务可以联系到一个且唯一一个问题上。
5 Idid marry the man of my dreams and yes he still is my one and only.
我确实嫁给了我的梦中情人，对，他是我的唯一；