extended surface短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 展开面,扩展受热面,添加受热面 The space- wave method, suitable for extended surface targets, is a preferable method for permittivity measurement of ground materials at microwave frequencies. 空间波法适合于测量大面积目标的介电常数，所以是测量地物微波介电特性的一种较好的方法。 cnki