吃透英语课本，提升在校竞争力
adv. 有意地；心照不宣地
The two women smiled knowingly at each other.
两个女人会意地相视一笑。
She knowingly kept the secret.
她故意保守了这个秘密。
adv.故意地；机警地，狡黠地
deliberately
intentionally
