How was the gap between a walking mammal and a swimming whale bridged?请问bridged什么意思?

题目

How was the gap between a walking mammal and a swimming whale bridged?请问bridged什么意思?
How was the gap between a walking mammal and a swimming whale bridged?Missing until recently were fossils clearly intermediate,or transitional,between land mammals and cetaceans.请问bridged什么意思,为什么放句末,后面一句结构不明白,用软件翻译给我的别填,用网上已有的回答敷衍的也别填,浪费你我的时间,

答案

我觉得应该是：有一定差异的陆地上爬行的哺乳动物和一头海中游泳的鲸鱼是怎么被联系到一起的?bridge是桥的意思,这里用bridge名词活用作动词,意思从“桥”变为“联系,连接”,意思明白之后把原词放入句子中,发现这里的...