The alternate warm and ice age periods was probably caused by a repeating cycle.

The history of monasticism is one of alternate periods of decay and revival.

She was recommissioned 10 November 1938, and resumed supply runs along the east and west coast in alternate periods, on occasion penetrating Alaskan waters.

Some species may require alternate periods of warm and cool storage to initiate bulblet growth.

A study in an Adelie Penguin colony found that the tick had alternate periods of feeding and off-host aggregation under rocks.

Management of the joint line was to be in alternate periods of five years by the two co-owners, the first five-year term being that of the Metropolitan.

These alternate periods of harmonious living followed by wickedness, contention, and separation play an important part of the Hopi mythos.

The sandwich method of course delivery consists of alternate periods of instruction at the College and training with an employer on-the-job attachment (6 months).

Then, after a bit, he tried again; and for the next hour he spent alternate periods yodelling and resting, but with no result.

The warped and twisted trees along the banks suggested alternate periods of flood and drought.