low-lev·el /ˈloˈlɛvəl/
  (a.)低水平的,低級別的
  low-level
  低階 低位準
  low-level
       adj 1: not intense; "low-level radiation"
       2: lower in rank or importance [syn: subordinate] [ant: dominant]
       3: at a low level in rank or importance; "a low-level job";
          "low-level discussions"
       4: occurring at a relatively low altitude; "a low-level
          strafing run"