"met secretly to discuss the invasion plans"
"the children secretly went to the movies when they were supposed to be at the library"
"they arranged to meet in secret"
例句
用作副词 (adv.)
They spied out the secret of her success. 他们秘密地查出她成功的秘密。
I tell you this in strict privacy. 我极秘密地告诉你这件事。
The lion was stalking in the grass. 狮子在草丛中偷偷地向猎物靠近。
Despite this, a deadly snake is smuggled in. 尽管如此,一条致命的毒蛇被偷偷地带进了皇宫里。