Sentence examples for is very difficult to check from inspiring English sources
In operation, it is very difficult to check, from simple observations or measurements, the real performance of such a house: different energy vectors may be used to meet the space heating as well as the domestic hot water demand, a storage tank may be used and fed by different energy sources (heat pump, direct electricity, solar thermal).
Due to the lack of external evidence for Old Chinese pronunciation, the first assumption is very difficult to check.
Many other map apps require a very good Internet connection to produce a street map, so it is very difficult to check on the map as you move through the city.
It's going to be very difficult to check whether standards are actually being raised or not.
But much of what he was told, and passed on to Fusion GPS, was very difficult to check.
But law-enforcement officials said it was very difficult to check this because there is no central registry of insurance policies.
It's very difficult to break in.
Be sure to zoom back out from time to time to check on your progress as it is very difficult to spot mistakes while zoomed in.
It is very difficult to repeat this".
"It is very difficult to look at".
