Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
People’s Liberation Army (PLA) researchers have gone beyond simply using recordings of whale and dolphin songs as secret code, unnoticed by enemy eavesdroppers, to now using artificial signal synthesis to “create” whale and dolphin sounds.
Source: https://thediplomat.com/2023/08/beyond-defense-chinas-pursuit-of-unorthodox-force-multipliers/