Sentence examples for it 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).

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 is very difficult to.

"But it is very difficult.

It is very difficult.

When you're going to do something that's very difficult to reverse, just double-check.

"It was very difficult".

It's very difficult music".

So it's very difficult.

A It's very difficult.

"It was very difficult economically.