ear coverts 耳羽
primary coverts 初级覆羽
tail-coverts 覆尾羽
medium coverts 中覆羽
lesser coverts 小覆羽
secondary coverts 次级覆羽
同义词： screen cover concealment
"covert actions by the CIA"; "covert funding for the rebels"
"a woman covert"
以上来源于: WordNet
ADJ Covert activities or situations are secret or hidden. 隐秘的 [正式]
They have been supplying covert military aid to the rebels.
他们一直在为叛军提供隐秘的军事援助。
covertly ADV 隐秘地
They covertly observed Lauren, who was sitting between Ned and Algie at a nearby table.
他们秘密地观察着邻近桌子上坐在内德和阿尔吉之间的罗伦。
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