英语 ⇄ 俄语 +

by covert means 强调
一般	тайно (sixthson); секретно (sixthson); скрыто (4uzhoj)
执法	негласно (т.е. в ходе негласных следственных действий 4uzhoj); в ходе негласных следственных действий (4uzhoj)
新闻风格, 语境意义	при помощи спецслужб (только в контексте; пример • Blaming the Russians for leaking a conversation that was presumably obtained by covert means poses problems for the US, as documents leaked by Edward Snowden reveal that the US has in the past listened into the communications of its allies, as well as enemies. 4uzhoj)