例句：
1、It would be a mistake to understate the seriousness of the problem.
對該問題的嚴重性輕描淡寫是錯誤的。
2、The seriousness of the situation is difficult to appreciate in its totality.
很難從全局上理解局勢的嚴重性。
3、He hasn't yet woken up to the seriousness of the situation.
他還沒有認識到形勢的嚴重性。
4、He spoke with a seriousness that was unusual in him.
他說話時神情少有地認真。