serious
美[ˈsɪriəs] 网络严重；严肃；认真；严肃的
1 . I know it's nothing serious and I feel quite unemotional about it.
我知道那根本没什么大不了的，所以有些无动于衷。
来自柯林斯例句
2 . Smoking places you at serious risk of cardiovascular and respiratory disease.
吸烟会大大增加罹患心血管和呼吸道疾病的风险。
来自柯林斯例句
3 . She was fitted with a pacemaker after suffering serious heart trouble.
她患上严重的心脏病后安装了心脏起搏器。
来自柯林斯例句
4 . The allegations are serious enough to warrant an investigation.
这些指控很严重，有必要进行一番调查。
来自柯林斯例句
5 . He sustained serious neck injuries after he broke someone's fall.
有人坠落压在他身上，致使他颈部受重伤。
来自柯林斯例句
1.concerned with work or important matters rather than play or trivialities;
a serious student of history
2.of great consequence;
marriage is a serious matter
3.causing fear or anxiety by threatening great harm;
a dangerous operation
4.appealing to the mind;
good music
5.completely lacking in playfulness
6.requiring effort or concentration; complex and not easy to answer or solve;
raised serious objections to the proposal