相關(guān)單詞近義詞 underground 地下的, furtively 偷偷地, secretly 秘密地, slyly 狡猾的, covertly 偷偷摸摸地, stealthily 暗地里, on the sly 秘密地, secretively 穩(wěn)秘地, sneakily sneaky的副詞形式...臨近詞surreptitious 返回 surreptitiously