num. 数词（数字）一；一个；（基数）一，第一
n. 名词一个人；一点钟；一体；独一
pron. 代词一个人；任何人；本人，人家；东西
He is the one who always helps others in need.
他是那个总是在别人需要时帮助他们的人。
This is the one book I recommend to everyone.
这是我推荐给每个人的那本书。
She is the one person I can trust completely.
她是我可以完全信任的那个人。
Only one of these options seems viable to me.
这些选项中只有一个对我来说是可行的。
He was the one who solved the complex problem.
他是解决这个复杂问题的那个人。
This is the one chance you have to prove yourself.
这是你证明自己的那个机会。
She found the one solution that worked for everyone.
她找到了那个对每个人都有效的解决方案。
He is the one candidate who meets all the criteria.
他是符合所有标准的那个候选人。
There is only one way to complete this task successfully.
只有一种方法可以成功完成这个任务。
She is the one who inspired me to follow my dreams.
她是那个激励我追随梦想的人。
one in a million 百里挑一
one way or another 不管怎样
one step at a time 一步一步来
one size fits all 一刀切
one and only 唯一的
one by one 一个接一个
复数: ones;
