?说真的

... Be reasonable. 讲理哦！ Be serious. 说真的 Beautiful day. 好天气。 ...

?是当真的

... be ready to act ( not merely talk ) ; be serious 是当真的 heap up 堆起 in the matter of ; as regards 在…方面;关于 ...

?要紧

... 要紧 be serious ; be critical ; important 他的病要紧不要紧? Is his illness serious ? 庆祝 celebrate (v.);celeration (n.) ...

?非常严重

... 不是闹着玩的事; 正经的事 be〔become〕 a serious matter 非常严重 be serious 讲笑话,开玩笑 speak funny story ...