No one knows for sure when or why it began to symbolize peace.(没有人确切地知道它是什么时候或者为什么开始成为和平的象征。)
We don't know for sure how much mass our Sun's lost over the last four billion years.(我们不知道我们的太阳在过去的40亿年里损失了多少质量。)
The meeting will be held in September, but nobody knows the date for sure.(会议将在九月举行，但没人知道确切的日期。)
"Aye, for sure, dear lad," she answered and she gave his shoulder a soft quick pat.(“是啊，当然了，亲爱的孩子。”她回答说，然后轻轻拍了拍他的肩膀。)
When they get to know me and to trust me, knowing for sure I'm not selling them something—there'll be more honest feedback from them.(当他们开始了解我、信任我，并确信我不是在卖什么东西给他们时，他们会给出更诚实的反馈。)
Tha's beginning to look different, for sure.(你开始变得不一样了，是真的。)
He'll come for sure.(他肯定会来的。)
We'd probably know for sure whether someone was shooting at the president from that famous grassy knoll.(我们可能确定是否有人正在从那个著名的草地山丘草地上向总统射击。)
"I can say for sure that no one else loves me more than you do in this world," stated Sophia tearfully.(“我可以肯定地说，在这个世界上，没有人比你更爱我了。”索菲娅含泪说道。)
