然而，在不对全世界的自然生态系统的剩余区域产生不利影响的情况下，进一步增加农业面积似乎是不可能的。
However, a further increase in farming area without impacting unfavourably on what remains of the world's natural ecosystems appears unlikely.
合适的栖息地，也就是说，那些实际的雨林面积要比夜冠橡树生长区域的那几公顷大得多。
The suitable habitat, that is, the actual rainforest is much larger than the few hectares where the Nightcap Oak grows.
它们将一束集中的光线反射到城镇的中心广场上，形成面积大约为600平方米的阳光区域。
They reflect a concentrated beam of light onto the town's central square, creating an area of sunlight roughly 600 square meters.
当我们在做一重积分时，并不是为了去求平面某区域的面积。
When you do single integrals it is usually not to find the area of some region of a plane.
如果运用一下格林公式，你就发现当沿着一个逆时针的曲线时，结果就是区域的面积。
And, now, if you apply Green's theorem, you see that when you have a counterclockwise curve, this will be just the area of the region inside.
用“三分法则”来避免对称在使用中有两种基本方法，第一种：我们可以把画面划分成分别占1/3和2/3面积的两个区域。
First we can divide the image into two distinctive areas which cover 1:3 and 2:3 of the size of the picture.
当你转完一圈回到这里时，表盘就显示这个区域的面积值。
But when you come back here, that dial suddenly gives you the value of the area of this region.
这是用来找出给定区域r的面积。
图片是过去十年间由美国间谍卫星拍摄的，它们证实了，在最近几年，大面积高纬度区域在夏天失去了冰层的覆盖。
The photographs, taken by spy satellites over the past decade, confirm that in recent years vast areas in high latitudes have lost their ice cover in summer months.
地图中的红圈代表着我们生存的这颗星球上的死亡区域的位置和面积。
Red circles on this map show the location and size of many of our planet’s dead zones.
生活区在二楼。尽管总面积很大，但官邸的起居区域只有五个小房间和两个不大的浴室。
Despite its overall size, the mansion's living area occupied just five small rooms and two modest bathrooms.
地图中的红圈代表着我们生存的这颗星球上的死亡区域的位置和面积。
Red circles on this map show the location and size of many of our planet's dead zones.
黑点代表那些已经观测到的但面积还未确定的死亡区域。
Black dots show where dead zones have been observed, but their size is unknown.
魁北克的“北方计划”开发的采矿，能源开发，林业区域面积是法国的两倍。
And Quebec's Plan Nord will open an area twice as big as France to mining, energy development and forestry.
通过该项目，被保护区域的面积快速增长而且碳截存也有了增长。
Under the programme, the area of protected land has risen rapidly and carbon sequestration has increased.
给出一个平面上的区域，求它的面积。
I give you some region in the plane and you want to know just its area.
举个例子，区域R的面积是dA的二重积分，便于理解，在这里写成。
So, for example, the area of region is the double integral of just dA, 1dA or if it helps you, one dA if you want.
那么，改变一下区域，把这块移到另一侧，我们得到对xdA的双重积分,是原点那的圆面积乘质心的x的坐标。
So, switching the area, moving the area to the other side, I'll get double integral of xdA is the area of origin times the x coordinate of the center of mass.
举例来说，海洋科学家们记录了在过去的10年中，亚热带洋流(最不具生长力的的海洋区域)的面积在不断增加。
For example, ocean scientists documented an increase in the area of subtropical ocean gyres-the least productive ocean areas-over the past decade.
该建筑总占地面积将超过21.6万平方米，涵盖包括娱乐、零售、会议场所、办公区域以及公园等多重功用。
In total, the building area is over 216, 000 square meters (+ 2.3 million sq ft) and will have various USES including entertainment, retail, convention space, offices and parking.
在面积这样小的区域内建造如此多的公寓单位，其住房密度将达到每英亩水域30个公寓单位，这样，该大楼周围便可留有更多的开阔水面。
With so many units built into such a small area, the housing complex will achieve a density of 30 units per acre of water, leaving more open water surrounding the structure.
这种技术看起来前途无量，不过我们必须耐心等待来自临床试验的结果，而且其治疗范围可能仅限于蛀牙面积比较小的区域。
It looks promising, but we will have to wait for the results to come back from clinical trials and its use will be restricted to treating small areas of dental decay.
不过，目前他们的面积和出现次数都在上升：目前发现的死水区域已经有超过400个。
But they are increasing in both size and number: dead zones have now been reported in more than 400 areas.
对大面积“死水区域”来说化肥残留物是罪魁祸首，在墨西哥湾，氧气耗尽的死水区域几乎没有海洋生物生存。
Fertilizer runoff is responsible for a vast "dead zone," an oxygen-depleted region where little or no sea life can exist, in the Gulf of Mexico.
虽然岛屿的总陆地面积保持稳定或有所增长，但某区域可能被侵蚀而其他区域得到扩大。
Even on islands where the total land mass is stable or grows, one area may be eroded while another is being added to.
虽然岛屿的总陆地面积保持稳定或有所增长，但某区域可能被侵蚀而其他区域得到扩大。
Even on islands where the total land mass is stable or grows, one area may be eroded while another is being added to.
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