emplacement的复数形式怎么拼写？

This alternation feature is commonly related to emplacement of C - shaped rolls.蚀变的特征一般同C形的卷型矿化有关.But they differ in association and mode of emplacement.但在共生和侵位的方式不同.Concrete emplacement has some shape transition.混凝土基座有一...

emplacement的音标：emplacement的英式发音音标为：[ɪm'pleɪsmənt]emplacement的美式发音音标为：[ɛm'plesmənt]...

n.放列动作，炮兵掩体，炮位，炮台...