Sentence examples for instruments is difficult from inspiring English sources
However, quick exchange of surgical instruments is difficult because an assistant performs the instrument exchange on the instructions of the surgeon, and there are many processes to be followed in exchanging an instrument.
However, velocity model calibration for location with surface instruments is difficult for several reasons: well log measurements are often inaccurate or incomplete, yielding intractable models; origin times of perforation shots are not always accurate; and the non-uniqueness of velocity models obtained by inversion becomes especially problematic when only perforation shots are used.
Assessment of the accuracy of instruments is difficult, because there is no gold standard for identifying abused children.
While we found good reliability of GCRS in assessing the communication quality of individual consultations, comparison with existing instruments is difficult due to limited published psychometric data on assessing consultation (rather than doctor) quality.
Changing the treatment of executive stock options and financial instruments was difficult enough even before such complications.
She contended that Mr. Bernanke had erred in producing "extreme ease" in monetary policy and in failing to warn investors that new financial instruments were difficult to price.
"It's still a handcraft and the instruments are difficult to come by, but just the fact that Seth could hang out his shingle and have a waiting list shows that the profile of Irish music is higher than ever".
This is also the reason why mechanisms intended for struck keyboard instruments are difficult to study; their normal functioning speed is beyond human observation capabilities.
The "classical" ASC implementation will not be discussed here, as these instruments are difficult to operate and require rather large samples (typically 0.5 g or more), but they were very successful in high-resolution studies of phase transitions [29, 30, 36].
