The definition of operator homeomorphism mapping , together with its characterizations, is given in this paper.在算子开集理论中给出了算子同胚映射的概念, 得到了算子同胚映射的若干性质....
The seats are cushioned.座位装有座垫.When you write, avoid sandwiching the bad news between an irrelevant, indirect, or overly cushioned beginning and end.在写文章时，不要把坏消息夹在毫不相关、拐弯抹角或过度铺垫的开头和结尾中间。Who would not suffer amid perfumed...
I tear up some of the floorboards.我掀起几块地板。...the shop's bare brick walls and faded wooden floorboards.商店裸露的砖墙和褪色的木地板Squeaking floorboards should be screwed down.踏上去咯咯作响的地板应用螺钉钉住。Screw down any loose floorboards...用螺...