We're not sure about that
不确定───uncertain;事───matter
The economic climate remains uncertain.───经济气候依然是不确定。
Our future looks uncertain.───我们似乎前途渺茫。
Her future is uncertain.───她前途未卜。
When Locke finally returned to England, he found the country in a state of crisis, and his own position in it especially uncertain.───当洛克终于回到英国，他认为国家处于危机状态，和他自己的立场，它是不确定的。
Throw in the immense gratitude I feel toward her, and I'm uncertain if I can even get through the conversation.───考虑到我对她巨大的感激之情，我不确定自己能够从与她的交谈中找回平衡。
Her eyes were still those of a young girl, just touched with an uncertain expression of innocence and inquiring.───她的眼睛还是象年轻的姑娘那样，带着一点捉摸不定的天真好奇的神情。
The police are still uncertain of the casualty's identity.
The outcome is still uncertain.
The experience had left her fearful and uncertain.
He was uncertain how much further he could walk.
He was uncertain about his brother's intentions.