不可數名詞limbo的意思是“懸而未決；停滞不前”，用法如下：be left in limbo/in a state of limbo被置于不确定狀态，如: Without that information, the case stalls and Medicare beneficiaries are left in limbo.如果沒有那些資訊，案子會陷入僵局，而醫療保險受益人則會處于不确定狀态。be stuck/held/caught/trapped in limbo陷入懸而未決的境地，Some mineworkers have returned home to the rural areas, but many remain stuck in limbo around their workplaces.一些礦工已經回到他們的家鄉農村地區，但很多人仍困在工作地周圍的不确定狀态中。remain in limbo仍然處于不确定狀态，A period of inactivity ensued, while the Armenian issue remained in limbo .接着進入了一段不活躍的時期，而亞美尼亞問題仍然懸而未決。live in limbo生活在不确定狀态中，Many still live in limbo, unable to rebuild while they deal with obstacles they didn't expect. 許多人仍然生活不确定狀态中，他們無法重建，因為他們要處理一些意料之外的障礙。sit/hang in limbo停滞不前，But this article sat in limbo for well over a week – long enough for me to give up and start looking for other venues – before it was accepted.但這篇文章被擱置了一個多星期的時間，在它被接受之前足夠我放棄并開始尋找其他發表途徑。wait in limbo在不确定狀态中等待，Patients who do qualify for the operation wait in limbo on long, shifting lists for donor livers. 有資格接受手術的患者需要在漫長而且不确定的肝髒捐贈者名單上等待，一起都是未知數。
