通航保证率的英文：
navigation dependabilty
n. 航行，航海；航海学，航海术；导航，领航
Navigation between tools and menus
在工具和菜单之间导航
Columbus was a famous navigator.
哥伦布是个有名的航海家。
She has trouble navigating the stair.
她上下台阶有困难。
Inflect the interface for typical navigation.
为常见的导航调整界面。
The man is a sixteenth Spanish navigator.
那个人是十六世纪西班牙的航海家。