Yeats, in "Adam's Curse," regrets that the beautiful is something to be labored for and he wants to conceal that labor.

他在亚当的诅咒中后悔地称,这种美值得为之劳累,他想隐藏这种劳累。

耶鲁公开课 - 现代诗歌课程节选

The other way is, I toss the coin first and I can conceal the outcome and then I ask, how much would you like to bet?

第二种,我先掷出硬币,然后盖住,问你,你愿意下多少赌注

耶鲁公开课 - 金融市场课程节选