確切地指出The engineers couldn't lay their fingers on the reason for the rocket's failure to bit. 工程師們不能確切地說出火箭沒有進入軌道的原因。We called in an electrician hoping he could lay a finger on the cause of the short circuit. 我們請來了一位電工希望他能發現短路的原因。
攤牌; 表明(意圖、計劃等)We can only reach agreement if we both lay our cards on the table. 我們雙方只有攤開來說才能達成協議。Perhaps you will make some progress if you lay your cards on the table. 如果你開誠佈公, 也許會取得某些進展。