He did not know that that ledge was only an hour or two's climb away and that before the light went they would probably have conquered two or three of these peaks.away在这是副词吗?做什么成分?
But the radio waves that we use for these purposes microwaves travel in straight lines. 这句话 that 后边是定语修饰 radio wave, 然后 microwaves travel in straight lines 是什么成分,以及这句话的谓语是哪呀?