退居二线的英文：
to retire/leave from one's leading post (sometimes to assume an advisory post)
The veteran cadre retired from the leading post of his own accord to assume an advisory post
这位老干部主动让位，退居二线。
v. 退休；（使）撤退；就寝；离开，后退；退役，退出；退庭；收回
The history instructor was a retired minister.
那位历史教师是个退休的牧师。
She is a retired teacher.
她是个退休教师。
He will retire from the army.
他明年从部队退役。
v. 离开；出发；舍弃；脱离；辞去；遗忘；听任；留下；交托
n. 休假；许可；辞别
To leave;vacate.
离开；撤出
I leave that to you.
这都留给你啦。
Leaves die, fall, and shrivel.
叶子凋零、飘落枯萎了。
num. 一；同一个、最重要的一个
det. 代替a或an，表示强调；某位（用于不太熟悉之人的姓名之前）
pron. 任何人；一个人；一个事物；其中的一个人
One, Taipei, one way.
台北单程票一张。
This one is not a spoof.
这个就不是开玩笑了。
One and one make(s) two.
一加一等于二。