to keep your plans or intentions secret
保持你的计划或意图秘密 (bǎochí nǐ de jìhuà huò yìtú mìmì)
"She always keeps her cards close to her chest during negotiations."
"她在谈判中总是把自己的底牌藏得很紧。" (Tā zài tánpàn zhōng zǒng shì bǎ zìjǐ de dǐpái cáng dé hěn jǐn.)
a very kind and generous person
to do more than what is required
To be very close friends
to lose consciousness temporarily
to agree to compromise with someone
To be caught unprepared or embarrassed.