bed: n.1.床，床铺；床位，铺；(动物的)窝；〔比喻〕安乐窝，坟墓；床垫；睡眠；就宿。2.婚姻，夫妇关系。3.台，土台；苗床；圃，花坛；养殖场；河床；矿床；湖底，海底。4.【地质学；地理学】层，底；【火箭】试验台；基地；【机械工程】底座；衬；机床床身；【建筑】地脚，地基；【铁路】路基；【印刷】版盘。5.一层；(树叶等的)一堆。短语和例子He is too fond of his
Example Sentences:
1.
Steeply tilted foreset beds are formed only under very restricted condition . 陡斜的前积层只有在非常严格的条件下才能形成。
