例句與造句

1. Then there is perhaps the most perfect measuring thing of all, the cesium clock.
2. One second is 9192631770 ticks of a cesium clock, without reference to any standard timepiece in France.
3. But this cesium clock, the experts promise, will neither gain nor lose a second in 6 million years.
4. Each spacecraft carried 2 rubidium and 2 cesium clocks, as well as nuclear detonation detection sensors, leading to a mass of.
5. Almost 80 percent of those organizations use cesium clocks made by Agilent Technologies of Palo Alto, Calif ., a subsidiary of Hewlett-Packard.
6. It's difficult to find cesium clocks in a sentence. 用cesium clocks造句挺難的
7. In 1976, Briatore and Leschiutta compared the rates of two cesium clocks, one in Turin above sea level, the other at Plateau Rosa above sea level.
8. Since 1967, NIST has calibrated time with a cesium clock that measures one second as precisely 9, 192, 631, 770 cycles of a cesium atom's resonant frequency.
9. :: : : : : : My opinion is that only Sagnac effect is the cause of a shift of cesium clock ( working with light ) and there is no time dilation.
10. The result, a clock the institute calls NIST F-1, is some three times as accurate as the NIST-7, a cesium clock invented in 1993 by the standards agency.
11. Accurate to one second in 1.4 million years, the cesium clock " is the most accurate realization of a unit that mankind has yet achieved, " the observatory says.
12. The breakthrough that allowed rack-sized cesium clock to be shrunk small enough to fit on a chip was a technique called coherent population trapping, which eliminated the need for a bulky microwave cavity.
13. Although scientists speak of " cesium clocks " and " rubidium clocks, " strictly speaking it is not the elemental material that keeps time, but the microwave being shot at it.
14. The National Institute of Technology's most accurate cesium clock, which along with a similar device in Paris is the most accurate in the world, will neither gain nor lose a second in 20 million years.
15. NIST-F1 is at the top of the time-keeping pyramid and is used to calibrate other clocks, including three cesium clocks and five hydrogen maser clocks that are averaged to create NIST's standard.
16. To have a time basis for this, PTB operates several atomic clocks ( currently two cesium clocks and, since 1999 and 2009, respectively, two cesium fountain clocks . ) By order of PTB, the synchronization of clocks via radio is performed via the time signal transmitter DCF77 operated by Media Broadcast.