| 1. | He lives up two pairs of stairs .
他住在三层（即再上去二层）楼上。 |
| 2. | Only two of the electrons in the second level reside in hybrid orbitals .
第二层仅仅两个电子处于杂化轨道中。 |
| 3. | The surge emptied out most of the apartments on the second floor .
巨浪已经把公寓二层楼上几乎所有的房间洗劫一空。 |
| 4. | The n=1 shell is the innermost layer, n=2 the next layer, and so forth .
N1的壳层是最里面的一层，n2是第二层，等等。 |
| 5. | I was housed in an elegant two-story guest house in the center of hanoi .
我下榻于河内市中心的一座雅致的二层楼结构的宾馆。 |
| 6. | However, relatively few of the secondfloor ceiling joists themselves were damaged .
但是第二层楼天花板托梁却被破坏得较轻微。 |
| 7. | When he reached the second landing he was breathing so hard that he stopped .
他走到第二层楼梯平台时，他的呼吸已急促得使他不得不停下来。 |
| 8. | The second-floor framing was not appreciably affected and only a few of the first-floor joists were fractured .
第二层楼板构架所受影响较小，只有第一层楼板少数托梁裂断。 |
| 9. | The second-story system suffered relatively little in structural respects although windows were broken and paste cracked .
第二层楼在结构方面所遭破坏较小，虽然窗户破碎，壁灰碎裂。 |
| 10. | This large size may represent the initial size of the fiber before secondary-wall deposition or fiber desiccation upon boll opening .
这个大小可以代表第二层壳沉积或棉桃开裂干涸前棉纤维本来的大小。 |
