How do we know for sure when enough variety is enough?
But the study results were not conclusive, and more research is needed before we know for sure.
You might think that when you play with your hair in our presence, we know that means you like us. We don't know for sure.
We do not know for sure what "hardships" Paul is referring to in our passage for today. They may have involved illness or life-threatening persecution.
One thing I know for sure, to be good in my business I could simply meet the expectations of my passengers.
And since I have been traveling, I don't know for sure, but I believe that the negotiators have agreed that for the next round that they should include the decision.
The one thing I know for sure is that I cannot get those hours of my life back, and that there is no point wasting more time by dwelling on it.
it ain't what you don't know that gets you into trouble,讓我們陷入困境的不是無知it's what you know for sure that just ain't so而是看似正確的謬誤論斷
I'm waiting for a train, the train that'll take me far away.我在等待一列火車，那列火車將載我遠去。I know where I hope this train will take me.我瞭然自己心向何方。But I can't know for sure.卻不知自己會被載往何處。But it doesn't matter.但這並不重要。Because we'll be together.因為我們會在一起。
How can you know for sure?
In general, however, it's hard to know for sure how old an old seed is.
At that moment I realized that I needed to know for sure whether my dog was retarded or not.
That's something you feel in every cell of your body, something you know for sure, for you can sense it all around you, right here, right now.
If you fail this test then you know for sure that you are not gradient field so you might as well do that.
For all his scientific methods of detection the only way the oilman can actually know for sure that there is oil in the ground is to drill a well.
What we know for sure is that when the curtain opens on Act III, the throne is occupied by a young boy: the nine-year-old Tutankhaten (" the living image of the aten ").
What gets us into trouble is not what we don't 's what we know for sure that just ain't so. 讓我們陷入困境的不是無知，而是看似正確的謬誤論斷.
But how do you know for sure?
These are the beginnings, yes; but how do you know for sure when you don't know the end, and how do you know, or even surmise, the end?
One thing we know for sure is that the British economy will suffer its first recession for 18 years in 2009.
Though it is hard to know for sure when these photos were taken, they were all released in the last seven days.
Do you remember all those years when scientists argued that smoking would kill us but the doubters insisted that we didn't know for sure? That the evidence was inconclusive, the science uncertain?
不懂的事情，你自然會倍加小心；惹禍上身的多半是你自以為懂的事。（It ain't you don't know that gets you into trouble. It's what you know for sure that just ain't so.）
Of course, no one can know for sure.
We'd probably know for sure whether someone was shooting at the president from that famous grassy knoll.
If there's one thing that I know for sure at this moment,is ing is ever going to be okay again.
Professor Boehman would like to see more research done so we can know for sure if (and how much) additional NOx pollution is caused by the use of nitrogen-enriched gasoline.
You're waiting for a train， 你在等待一列火車a train that will take you far away... 一列把你帶向遠方的火車 know where you hope this train will take you， 你知道這火車會帶你到你想去的地方but you can't know for sure! 但你無法確定!But it doesn't matter! 然而那都無關緊要!Now tel
All I know for sure is that the airlines and their regulators better think of something before too long.
We will never know for sure the truth about the Stone Age tribes people of Herxheim. We will never know their names, or the names of their gods, nor exactly why they ate their dead.
I don't know the secret of success, but I know for sure the secret of Failure is try to please everybody.我不知道成功的祕密,但我卻知道失敗的祕密是試著阿諛奉承每個人。
I am go to take a throat culture so we 'll know for sure .
We don't know for sure what exactly the Five Feathers is (a pub? a pet store? a bird zoo?) but we do know that it's located in Barnsley - and that Budgie the waterskiing budgerigar lives there.
What do you know for sure?
Faron Young didn't care about her feelings. Neither did the moth above the sink. She didn't know for sure what Robert Kincaid thought.
Perhaps. All we know for sure is that he was the only one to show gratitude.
You're waiting for a train, a train that will take you far away. You know where you hope this train will take you, but you can't know for sure. But it doesn't matter,now tell me why - because we'll be together.
One thing I know for sure: You are more than a job title, you are worth more than a number on a paycheck and you are more than an award to hang on your wall.
you are waiting for a train,a train that will take you far away,you know where you hope it take you,but you don't know for sure,but dosen't matter,because we'll be together. 你在等一班火車，火車會帶你去很遠的地方，你不知道火車會帶你去哪裏，但你並不確定，不過不重要，因為我們永遠在一起。
Regarding my knowledge on Chinese direct marketing, here is what I know for sure: It's one of the hottest countries for direct marketing in the world.
We don't know for sure, but we do know that every species that is removed … results in some weakening of the ecosystem.
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