Sentence examples for can know how long from inspiring English sources

But who can know how long the river is, or where it leads, until you reach its end?

In truth, of course, neither he nor anyone else can know how long this - whatever this is - will take.

The RTS packet will tell the time duration that the media is accessed, thus each station can know how long it has to wait until the channel will become idle.

No individual can know how long that will turn out to be, and it is just not realistic to expect most people to save enough for all or most of what they may need over an uncertain span after employment.

Taking more aggressive action might have only a modest effect on spending, and nobody — including the most passionate advocates for more government action — can really know how long the bond markets will stay calm.

We can now know how long it takes for shell to go into the air, how long does it burst, what color and what hues are they -- that can all be logged in a computer now.

"Nobody can really know how long this project will take, but I think that what we've learned is that it's not a question of time, but rather a question of urgency and of will," said Derek Cressman, Common Cause's vice president of state operations.

The information can help investors know how long an adviser has been working in the industry.

"How can I? Do you know how long it's been since I've exfoliated?

Many electric cars have shown the world that it can be difficult to know how long a battery will actually last until you use it in real world conditions.

Harrison says one example EM-Sense application the team has put together is a timer for brushing your teeth so that when an electric toothbrush is turned on the wearer's smartwatch automatically starts a timer app so they can glance down to know how long they need to keep brushing.