play close to the vest 保守秘密
keep close to the vest 严守秘密
Hold your cards close to the vest.
收好你的牌。
youdao
He is a trustworthy guy because he can keep anything close to the vest.
他是一个值得信赖的人,因为他可以做到对任何事守口如瓶。
Big advertisers have kept the information they gather from their own campaigns close to the vest.
大型广告客户将从自己主办的活动中收集到的信息牢牢抓在手里。
The technology company often keeps its products and ideas, close to the vest until as late as possible.
WSJ: Apple Moves Forward With TV Plans
"He keeps his cards close to the vest, so it's hard to tell what he's thinking, " he says.
NPR: Ex-Rocket Scientist To Oversee Financial Bailout
So Berkman took off, holding the stitched together passes close to the vest.
CNN: 'Hungry dog' eats, vomits up treasured Masters tickets
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