Sentence examples for proved difficult to observe from inspiring English sources

It has been conjectured for some time that the sudden energy release associated with secondary instabilities may initiate structural failure, but this has proved difficult to observe experimentally.

Neutrality proved difficult to maintain, though.

Alas, it proved difficult to find.

The advice proved difficult to follow.

It was proving difficult to find.

The original intention had been to interview carers of people whose care had been observed on the ward, but this proved difficult to arrange in practice.

Yet reform proved difficult to implement.

The furlough plan proved difficult to enforce.

Genocide has proved difficult to prosecute.

The effect proved difficult to measure.

Spectacular early results proved difficult to sustain.