areal area的用法和样例：
例句
- Earthquakes often cluster in the high gradient areas, which is very different from the case in the area of lower gradients.
布格重力异常高梯度区与中强地震的空间分布有很好的一致性，与低梯度分布区的弱地震活动性形成鲜明的对比。 - Moreover, Shangqiu was in Yueshi Culture area in the period of Xia and Shang, and then was replaced by the Shang culture in the phase of Bai-jiazhuang.
再者，豫东商丘，夏商时期为岳石文化分布区，而至白家庄期则为商文化所替代。
