pipeline
noun [ C ] uk/ˈpaɪp.laɪn/ us/ˈpaɪp.laɪn/
（常指铺设在地下的）管道，管线
a very long large tube, often underground, through which liquid or gas can flow for long distances
Idiom
in the pipelineidiom 在筹划中;在进行中
being planned
The theatre company has several new productions in the pipeline for next season. 剧团正在为下一个演出季排练几个新剧目。