Similar words: period, periodic, time period, periodical, grace period, final period, periodically, periodicity.
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271. The vagaries of collection over 12 hours are so great that shorter collecting periods are preferable.
272. The primary cosmic radiation that reaches the earth is minimum at periods of maximum solar activity.
273. In periods heavily influenced by ideology, political loyalties no longer coincide with national boundaries.
274. Washing slices or cubes of certain tissues for various periods results in many physiological responses.
275. Two thirds of the continent was covered in ice during glacial periods.
More similar words: period, periodic, time period, periodical, grace period, final period, periodically, periodicity, periodontal, periodic law, latent period, periodontium, periodization, periodic table, periodontitis, waiting period, latency period, inferior goods, discount period, neonatal period, periodic inventory, reconstruction period, rio de janeiro, superior, cheerio, serious, interior, anterior, exterior, race riot.