相互: mutual; reciprocal; each other 短语和例子相互扭打 pitch into each other; 相互依存, 相互促进 (politics and economics are) interdependent, mutually promotive; 相互影响 influence each other; interact; 相互关系 mutual
面积: [数学] area 短语和例子建筑面积 built-up area; 居住面积 dwelling area; floor space; 大面积丰收 bumper harvest over an extensive area; 茶叶种植面积 the acreage under tea trees