Until now, the plane, which was first flown in tests in 1969, has had a good safety record, albeit with sporadic difficulties.
Some have problems at all stages, others have sporadic difficulties, and a proportion fail to graduate at all, either leaving voluntarily or having their course terminated.
This was sporadic trouble with flare-ups of more or less difficulty that began in the late 1960's, ending finally in 1998.
Due to the inherent difficulty in identifying pathogenesis in sporadic disease (that can only be currently studied many years after the primary events have occurred), this controversy is likely to remain for some time.
Asking the question, 'Has your child ever wheezed?' at one time point is more likely to include children with persistent wheezing or asthma diagnosis due to difficulties of parental recall of sporadic wheeze in early childhood.
To be sure, there had been some occasional difficulties with Dr. Chen, but those were sporadic, and besides--the fellow had written a first-rate letter for the first employer who had requested it.
However, the organization was facing sporadic attendance at performances as well as financial difficulties, with a deficit at the end of 1999 of $700,000.
sporadic ALS (SALS) remain obscure due to the difficulties in developing animal models.
Kohat's difficulties with the Taliban have been more sporadic, but two weeks before I arrived a suicide bomber had detonated himself beside a soccer team of Army soldiers as they walked home after a match, and twelve of them died.
In both patients genetic testing allowed to diagnose the Smith-Magenis syndrome (SMS), usually a sporadic disorder characterized by dysmorphic features, hypotonia, developmental delay, speech difficulties, sleep disturbance, and behavioural problems (hyperactivity, aggression, and autoagression) [ 17].
Sporadic fighting and resistance could last even longer, adding to the difficulties of setting up a fully functional local government.
