例句：
I'm certainly never going there again.
我肯定不会再去那里了。
'Certainly not,' he replied emphatically.
“当然不。”他断然回答道。
Moby certainly has a fine ear for a tune.
莫比对音调的分辨能力一定很强。
Our future looks uncertain.
我们似乎前途渺茫。
Her future is uncertain.
她前途未卜。
They're both uncertain about what to do.
他们两人都拿不定主意该怎么办。