“摊牌”，本意指“把手里一切的牌摆在桌面上（lay one's cards on the table, reveal one's cards）”，后比方“把工作的有关状况都向对方揭露，标明自己的实在目的”，与英语习语“show one's hand”意思附近，表明“to make one's plans, intentions, ideas, or resources known to others, especially those that were previously hidden or kept secret”。

例句：

在商务商洽中，关键是不要立刻摊牌，不然你可能会失掉最好的买卖时机。

In business negotiations, it's important that you don't show your hand right away, or you might risk losing out on the best deal possible.

他们要是不愿摊牌，商洽就不会有发展。

Thenegotiationswillnotmakeprogressas long astheyrefusetoshowtheirhand.