B2 a part of an activity or a period of development阶段；发展时期
If you do something in stages, you divide the activity into parts and complete each part separately.分步骤进行，逐步进行
specialized engineering one of the separate parts of a rocket, each part having its own engine（火箭的）级
My Spanish never really progressed beyond the stage of being able to order drinks at the bar.
I do not propose to reveal details at this stage.
At some stage we need to calculate when the project will be finished.
Confession is the first stage of coming to terms with what you've done.
The corpse was in an advanced stage of decomposition.
A2 the area in a theatre that is often raised above ground level and on which actors or entertainers perform舞台
a particular area of public life（公共生活的）领域，舞台
to go onto the stage and start to perform登台表演
The show climaxed with all the performers singing on stage together.
She made her professional stage debut in Swan Lake.
The cast all lined up on stage to take their bow.
She made her exit from the stage to rapturous applause.
He made his first stage appearance at the age of six.
C2 to arrange and perform a play or show上演，演出
to organize an event举办，组织
We're staging a revival of a 1950s play.
Protesters staged an anti-war demonstration in front of the US embassy.
Senior union workers staged a walkout this afternoon at the annual conference over the proposed changes in funding.
Students staged a sit-in in the university offices as part of their protest campaign.
The commandos staged a daring raid on the enemy.