新概念2 43课 mountains that lay below怎么还原?mountains 在定从中是做主语吗?below后面是省略了飞机吗

新概念2 43课 mountains that lay below怎么还原?mountains 在定从中是做主语吗?below后面是省略了飞机吗 新概念第二册43课句子翻译Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.中的lay below在这里是什么意思? B( ) l can't climb mountains recently I haven't been to the mountains 新概念英语2 57课 新概念2 47 课Composition 新概念英语2,第三课 新概念2第五课课文, 新概念2 35课课文 新概念英语2练习册43, 新概念2第79课80课 新概念2册79课课文 新概念2第8课课文. 新概念英语2,79课摘要写作 新概念2册80课课文 新概念第2册课文52课 新概念2册81课课文 新概念英语2第49课