中央峰

当主量子数n为奇数，赖曼线形不存在中央峰，而形成分裂的双峰。

As the principle quantum number n is odd , there is no central peak and two splitted peaks exhibit for the Lyman line profile .

高分子保护的纳米粒子的细致结构可以从扫描隧道显微镜（STM）图像中得到，单个粒子的横切图像分析中显示存在着一个中央峰和两个肩峰。

The fine structure of polymer protected nanoparticle can be derived from their scanning tunneling microscopy ( STM ) images . There exist a central peak and two side peaks in the cross sectional images of individual particle .

Chesapeake湾撞击坑主要形态像一顶倒置的宽边大草帽，包括外缘、环状洼地、峰环（内缘）、内盆和中央峰。

The crater is like an inverted " sombreo ", and the principal morphological features include the outer rim , annular trough , peak ring ( inner rim ), inner basin and central peak .