有两个关于SAT的问题 求牛人回答

有两个关于SAT的问题 求牛人回答
1.The young fish were very tiny,yet each of them ate many times its own weight in solid food every day.
我不懂的是WEIGHT后面那个in 怎么解释 因为感觉weight应该是和前面的ate many times its own weight 在一起 也就是吃比自己体重重很多的东西 那么in 呢?难道还有eat in ..food这样的说法么?

2.When the tide was in and the water rose up to within a foot of the lawn ,we children boasted thatwe could fish out of our bedroom windows,This was not quite true.But it was true that,from our front lawn,the house was full of waves.When the tide was up and the sun ws shining,the white front of the house was in movement with reflected waves.The tall windows became so solid in color and form,gold and blue,that the house seemed to be full of sea;（until,of course,one turned round and saw the real sea,so miraculously real that it startled.）
不好意思打了那么一大段上来~其实我不懂得只有括号里面那一句.这个ONE 指的是什么?turn round意思是转过身么?整体又怎么理解呢?
但是他后面是“that it startled” 如果是人的话就不应该是it啊 it