| 释义 |
variable ceiling variable ceiling[′ver·ē·ə·bəl ′sēl·iŋ] (meteorology) After United States weather-observing practice, a condition in which the ceiling rapidly increases and decreases while the ceiling observation is being made; the average of the observed values is used as the reported ceiling, and it is reported only for ceilings of less than 3000 feet (914 meters). |