1·The mother supports her 2 baby near the surface in order to help it to breathe until it is strong enough to swim on its own.
母亲在水面附近支撑着她的两个宝宝，以帮助它呼吸，直到它强壮到可以自己游泳。
2·Recent field studies, however, reveal that on dives in the wild, the seal usually heads directly for its prey and returns to the surface in less than twenty minutes.
然而，最近的实地研究显示，在野外潜水时，海豹通常会直接冲向猎物，并在不到20分钟内返回水面。
3·Its graph will be a surface in space.
图像是空间里的一个曲面。
4·And, now that will become, actually, a surface in space.
实际上它是空间中的一个曲面。
5·We've only scratched the surface in terms of what we can do.
我们仅仅了解了我们所要做的皮毛而已。
6·s Let's say that we have a vector field and s, a surface in space.
假设空间中存在一个向量场和一个曲面。
7·Some carbon comes from the mantle to the surface in the form of diamonds.
有些来自地幔的碳以钻石的形式到达地表。
8·So, to draw the graph we look at the surface in space defined by z equals -y.
为了画出图像,观察由z=-y所定义的空间中的曲面。
9·Jack worried about the sort of man who floated to the surface in such an ocean.
这类人在情报机构的泛滥令杰克忧心忡忡，幸好还有沃尔什这样的人。
10·The LRO produced stunning photographs of the lunar surface in 2009 from an altitude of 31 miles.
这个监测卫星2009年的时候在31英里的高度拍下了令人震惊的月球表面照片。