lingering

lingering
adj [esp attrib 尤作定语]
(a) long; protracted 逗留的; 拖延的
    a lingering illness 缠绵的疾病
    a last lingering look 依依不舍的最後一瞥.
(b) remaining 继续存在的
    a few lingering doubts 萦绕脑际的几点疑问
    a lingering sense of guilt 耿耿於怀的愧疚感.

牛津英汉双解词典