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有效面积
1、active───n.主动语态；积极分子；adj.积极的；活跃的；主动的；有效的；现役的
2、common areas───[计]公用区
3、ambulacral areas───步行区
4、ellagic active───鞣花活性
5、active motif───活动母题
6、downtown areas───市中心
7、approximating areas───近似面积
8、rest areas───n.支托区( rest area的名词复数 )；休息场所；休息站
9、areas───n.区域，领域；面积（area的复数形式）
1、introduced several active areas of receptor modeling studies and put forward the major research projects to be launched now.───介绍了受体模型研究的一些热点问题，提出当前应开展的主要研究课题。
2、Volatility has been one of the most active areas of research in empirical finance and time series econometrics during the past decade.───在过去十几年中，波动率已经成为实证金融和时间序列计量经济学研究的最活跃领域。
3、Therefore, the second-hand housing demand, has become the most active areas of turnover .───因此，二手房的需求，已成为最活跃的地区的营业额。
4、Iceland lies on the convergence of two tectonic plates and is one of the most volcanically active areas in the world.───冰岛矗立在两块地壳板块的聚合点上，是世界上火山活动最活跃的地区之一。
5、IR technique is one of the most active areas that researches into the real-time detection of the concentration of Methane.───利用红外技术实现煤矿瓦斯浓度的实时检测是目前比较活跃的研究领域之一。
6、Two particularly active areas of the Sun are marked by dark plages.───太阳上两个特别活跃的区域由两个暗斑标出。
7、It is able to calculate the degree of movement for each pixel, which allows it to identify the particular active areas in each scene.───它能计算出每一个像素运动的角度，这些可以让它能验证每一个镜头ZhongTe殊的活跃的区域。
8、As a kind of information material, spherical fused silica is one of the most active areas.───作为信息材料，球形石英一种是最活跃的地区之一。
1、Iceland lies on the convergence of two tectonic plates and is one of the most volcanically active areas in the world.
2、Both the water and the heat from such active areas would be of great value to a Mars expedition.
3、In recent years, applications to environmental cleanup have been one of the most active areas in heterogeneous photocatalysis .
4、Qingdao has become one of the most active areas in MICE economy in China; MICE is an emergent and sunrise industry in the Qingdao urban economic development.