你可不能把这样重要的工作当儿戏: you shouldn't regard such important work as a trifling matter
不可: 1.(不可以) cannot; should not; must not; not allowed; forbidden 短语和例子不可一概而论 must not make sweeping generalizations; 不可剥夺的权利 an inalienable right; 不可抗拒的历史潮流 an irresistible historical trend; 两