| 单词 | ndb |
| 释义 | > as lemmasNDB NDB n. Aeronautics non-directional (radio) beacon. ΚΠ 1960 McGraw-Hill Encycl. Sci. & Technol. IV. 231/2 Radio stations erected specifically for use with the ADF are known as NDB (non-directional beacons or radiophares). 1990 Pilot Oct. 72 (advt.) Why train at a minor airfield when you can learn at London's third International Airport with full ATC, ILS, NDB and radar. < as lemmas |
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