Sentence examples for it is very difficult to extend from inspiring English sources

However, it is very difficult to extend it to surfaces and the existing formulations have some problems that they cannot use arbitrary boundary curves.

Moreover, this scheme is very difficult to extend to larger networks.

It is very difficult to.

Second, this scheme is very difficult to be extended to larger networks and hence is not scalable.

It is very difficult.

"But it is very difficult.

"It was very difficult".

It's very difficult music".

So it's very difficult.

A It's very difficult.

"It was very difficult economically.