51.

After being out in the wind and rain for years and years the walls of this apartment building are weather-beaten and brittle.

在风雨中度过了多年之后，这座公寓楼的墙壁饱经风霜，脆弱不堪。

52.

I gave an answer that was way out in left field when the teacher caught me off-guard and called on me.

我的答案有点旁门左道，当老师趁我不注意突然叫住了我。

53.

These two have completely different patterning but no difference is seen in their internal morphology so it seems that they are considered the same.

这两者有完全不同的图案，但在它们的内部形态上没有区别，所以似乎它们被认为是相同的。

54.

Still others simply travel around America in recreational vehicles, seeing parts of the country they had been too busy to see before.

还有一些人只是乘坐游艺车环游美国，去看这个国家一些他们以前因为太忙而看不到的地方。

55.

When she saw the lengths he'd gone to to get all dressed up, she couldn't help letting a brief chuckle escape.

当她看到他花了很长时间才穿戴完的模样的时候，她忍不住格格笑着跑开了。