to keep one's plans or ideas secret
将计划或想法保密 (jiāng jìhuà huò xiǎngfǎ bǎomì)
"He always plays his cards close to his chest in business."
"他总是在生意中玩自己的牌靠近胸口" (tā zǒng shì zài shēngyì zhōng **wán zìjǐ de pái kàojìn xiōngkǒu**)
to decide something
a flight that leaves late at night and arrives early in the...
to resolve small problems or differences
someone who is unemotional or not friendly
to take strict action to stop something
to be in control or have an advantage