Seasonal variations probably can best be described as alternations of dry and wet seasons.
A sequence of strata, therefore, may appear as alternations of coarse and fine particles, as a series of colour changes resulting from differences in mineral composition, or merely as layers of similar aspect separated by distinct planes of parting.
Study of the shells of planktonic foraminifera in these cores shows that the climatic changes, ice ages, and interglacial ages of the last two million years have been recorded in the sediments as alternations of species adapted to cold or to warm water.
The DISCO-study is based on protocols of all approved clinical trials that allocated participants prospectively and concurrently to comparison groups by random or quasi-random methods of allocation (such as alternation, date of birth, or case record number) and compared one or several interventions with a placebo or sham intervention, another active intervention or no intervention.
(It should not be confused with the earlier sense of an opera diva's trill as "the alternation of musical tones a diatonic second apart").
The art historian Richard Schiff, writing with his usual acuity in the show's catalogue, sorts out the splayed cards in one player's hands as an alternation of "light blues against darker blues, various cool blues against warm violets".
William James described consciousness as the "alternation of flights and perchings," suggesting that we tend to overvalue the "perchings," the nouns or the primary verbs in a sentence that steal the spotlight from the little words, like "in," "and," "but," "or," and "of".
Development of novel electrocatalysts with low cost and high activity as an alternation of expensive Pt-based catalyst has been one of the most important topics in the field of PEMFC.
Furthermore, as the alternation of Byzantine victories and defeats against the Arabs illustrates, no side was able to permanently gain the upper hand.
It has been recognized as the alternation of monoamine neurotransmitters serotonin and norepinephrine in the brain [ 2].
