[tiǎo zhàn]
（挑衅） throw down the gauntlet; challenge; challenge to battle
accept the challenge; take up the gauntlet
接受挑战
issue one's challenge to ...
向 ... 发出挑战
She looked at me with challenge.
她带着挑战的目光看着我。
The election of the new government was met by a challenge from its opponents.
新政府当选的合法性受到了反对派的挑战。
（提出竞赛） challenge to a contest; challenge