Sentence examples for are difficult to recognize from inspiring English sources

Metalmarks are difficult to recognize because many species mimic other lepidopterans and have evolved almost every combination of colour and wing shape.

But many urologists believe screening saves lives, and the American Urological Association recommends that men consider starting it at age 55. "Ethical tragedies are difficult to recognize in the present," Dr. Aronowitz wrote.

Thus, small patches are difficult to recognize in the waveforms.

These dependencies are difficult to recognize during the engineering of an AMS (Alarm Management System).

The mechanisms of sudden cardiac death are difficult to recognize, but repolarization disturbances have been shown to be the cause.

However, surface features on asteroids are difficult to recognize from ground-based observations, and it is often unclear whether such prominent features really exist.

ATTENTION SPAN -- Sometimes it is difficult to recognize that you aren't concentrating.

"It's difficult to recognize anyone not out of New York, not on either coast," she said in a recent interview.

In some cases, hypothyroidism is very mild and is difficult to recognize because it causes few symptoms.

Among the reasons that leisure can be difficult to recognize is that under certain conditions it overlaps the other two domains.

Her face swelled and discolored, and within an hour, were it not for her arms and legs, it would have been difficult to recognize her as a human.