wait in the wings

基本解释

Perhaps, after decades of waiting in the wings, the technology is finally about to hear its name called out from the stage.
或许，在等待助其飞翔的翅膀等了数几十年之后，这项技术最终等来了召唤其登上舞台的呼声。
If you know your partner has someone waiting in the wings, it’s hard to be motivated to work on your relationship, or to be enthusiastic about it.
如果你知道你的另一半有别的人在翘首以待，确实是很难让你经营这段感情或是对它抱有热情。
The Turkish army is waiting in the wings while the other armies fight the initial battles.
其他军队都派到了战场第一线，而土耳其军队正在耐心的等待时机的来临。
iask.sina.com.cn

And Phase 3, Consolidation, and Phase 4, Boom II, are waiting in the wings.
FORBES: A Season For Surprises
In the end there will be 12 jurors seated with 6 alternates waiting in the wings.
FORBES: Rajaratnam Trial Begins -- The Judge, The Jury and Early Defense Win
All the wordage about succession and fully vetted jockeys waiting in the wings misses the point.
FORBES

If someone or something is waiting in the wings, they are not yet active or important, but are ready or likely to be so soon.