She successfully graduated from naval training and became a sailor.

graduated 是动词 graduate 的过去式，graduate 由词根 grad（步、级）和后缀 -uate 组成，本义是"逐步完成"，引申为"毕业"。 from 是介词，表示"从...离开"或"完成...的过程"。 graduate from 是一个固定搭配，表示"从某个教育机构或训练项目完成学业/训练"。