Clusters above medium size, usually single-shouldered, the shoulder being connected to the cluster by a rather long stem, medium in compactness and with many abortive fruits.
Clusters medium to large, intermediate in length and width, usually single-shouldered, compact.
A perforation is usually single, and varies in size from a small pinhead to complete destruction of the membrane.
The stone, which is usually single, may be so large and so hard that it is necessary to crush it before it can be removed.
Bronchiectasis and other infective diseases of the lungs are less common causes of cerebral abscess, which is usually single, and may occur in any part of the brain.
The macronucleus is usually single, elliptical in form, and centrally placed; one micronucleus.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "usually single" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
