periods造句
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.
12345678910