1.含有one以及first的成语
(1) one by one 一个个地
Students went out of the classroom one by one as soon as the bell rang.
下课铃一响，学生们一个个从教室里走出来。
(2) at one 一致
Their opinion is at one.
他们的意见一致。
(3) in one 合为一体
It's a book of English phonetics，grammar and usage in one.
这是一本英语语音、语法和习惯用语结合为一体的书。
(4) one another 互相
We should help one another.
我们应该互相帮助。
(5) one to one 一比一
Neither of them won，one to one.
他俩没一个赢，而是一比一。
