| 释义 |
noun Electronics.a radar signal reflected to a radar station on the ground by a building or other fixed object. Words nearby permanent echopermanency, permanent, permanent cartilage, Permanent Court of Arbitration, permanent dentition, permanent echo, permanent hardness, permanent health insurance, permanent magnet, permanent mold, permanent press Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |