sure of

基本解释

If you’re not sure of how another person feels, ask them.
如果你不能确定他人的感受，你可以提问。
But what I would say is that we should not be comfortably sure of anything.
但是我最终想要表达的是我们都不可能完全确定任何事情。
Yet even then, not sure of what I read and typed, I knew that it had something to do with me — who, like Mole, albeit against my will, also left my insulated world and sailed toward the unknown.
然而，即便当时我不完全理解阅读和打下的字句，但我清楚它与我有一定关联：我，就像鼹鼠一样——尽管是在违背我的意愿的情况下——离开了我那隔绝的世界，朝着一个陌生的地方开始了航程。

They felt sure of success. For now,enough leaders of the Southern Alliance were willing to support the idea.
Cervantes is preoccupied with a figure who is crazy we're pretty sure of that, but he certainly isn't.
塞万提斯专注于一个疯了的人物,这一点我们很确定，但是他并不这么认为。
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Because it poses, it just throws out the fact that you're not sure of something
因为这个句型造成，它明显地表明了你对于某事并不确定，
I wonder if 课堂 - SpeakingMax英语口语达人

Most days he's not even quite sure of the next stop on his frenetic travel schedule.
FORBES: The Answer Man