Sentence examples for frequently difficult to achieve from inspiring English sources

This is frequently difficult to achieve in the presence of hypercapnia.

Patient participation in research studies is often difficult to achieve, and efforts to increase participation rates fail frequently.

However, that goal is often difficult to achieve.

These new remission criteria are frequently believed to be difficult to achieve [ 13, 14].

This step is not the most difficult to achieve because the truncation of TEs occurs rather frequently.

Gas outburst accidents frequently occur during mining of these seams, therefore the productivity is lower, and it is very difficult to achieve safe and efficient mining.

But that is difficult to achieve.

It is the most difficult to achieve.

Qualitative goals were also difficult to achieve.

The effect is difficult to achieve.

Here that is more difficult to achieve.