“长久地”用英语怎么说？

彼得深邃的目光长久地注视着他。Peter gave him a long deep look.房顶未必能如侯爵设想的那么长久地遮挡住天空.That might not be so long as the Marquis supposed.宽大的住宅并不能长久地留在游人的记忆中.For it is not the large houses that live in the memory of the visitor....