同时对基于地理信息系统(IS)可达性评价技术作了一定的探讨.The GIS - based technique of accessibility measure is discussed also.相对来讲, 国内关于可达性的研究尚不丰富.Comparatively, home still is not abounded about the research of accessibility.所以本文将其分为个人可达性和空间可达性.So...
Basic food products are frequently unavailable in the state shops.在国营商店里经常连一些基本食品都买不到。Mr Hicks is out of the country and so unavailable for comment.希克斯先生目前不在国内，所以无法发表评论。Her manuscript is unavailable.[美]她的稿件不拟采用....
She spent seven days afloat on a raft.她在一只木筏上漂泊了七天。His business is facing difficulties, but it is staying afloat.他的生意遇到一些困难，但还能维持。We kept her afloat for a couple of hours by bailing frantically.我们拼命往外舀水，使它继续漂浮了几个小时。A num...