Stress concentration area的用法和樣例：
例句
- She was two years ago, Kuantan in a concentrated area witch compatriots descent, to open a center.
她於兩年前，在關丹一個巫裔同胞集中區，開設一間中心。 - In Jiamusi massif,both of concentrated area of gold deposit and organic matler rich khondalite series have a common distributive regularity.
佳木斯地塊金礦集中區與富含有機質的孔達岩系具有同分佈的規律，它是金礦集中區有利的礦源層和賦礦圍岩。
