"用帷幕分隔" can be translated as "separate with curtains" or "partition with curtains".
Here are a few example sentences to illustrate the usage:
They decided to separate the large hall with curtains to create smaller, more intimate spaces.
(他们决定用帷幕将大厅分隔开,以创建更小、更私密的空间。)
The designers used curtains to partition the open-plan office into different work areas.
(设计师们用帷幕将开放式办公室分隔成不同的工作区域。)