Sentence examples for periodically required from inspiring English sources

The mutual gravitational interactions within the solar system were so complex that mathematical solution seemed impossible; indeed, Newton had concluded that divine intervention was periodically required to preserve the system in equilibrium.

They used the tennis court or a nearby military helipad that periodically required everyone to pick up the cones and run off the pitch when a craft came in to land.

Understanding the molecular mechanisms of resistance to NRTIs and NNRTIs, and their complex relationships, may help in designing new drugs that are periodically required to overcome existing as well as emerging trends of drug resistance.

Any modern art gallery worth its salt is periodically required to raise a hue and cry with some new acquisition, to provoke a chorus of bemused or angry onlookers to exclaim: "But is it art?" By that token, the Museum of Modern Art in Manhattan just put itself back at the top of the big league.

In addition, students enrolled in this course were periodically required to facilitate the postlaboratory discussions in their section, which included posing conceptual questions of Biol18 students to encourage participatory learning.

The centrist, grey politicians who have mindlessly repeated the mantra of growth-and-trade for decades have become aware that those whose votes they periodically require no longer see these deals as working for them.

If a car is started, the device periodically requires that the driver take another, rolling test, to make sure the driver did not have someone else start the car and is not drinking while driving.

In Tijuana, Mexico, near San Diego, a sewage treatment system is in the planning stage, but for now the city continues to discharge sewage into the Pacific, periodically requiring American health officials to close beaches in Southern California.

As Vladimir Lenin wrote, "In some decades, nothing happens; in some weeks, decades happen". Get ready for the creative destruction of public institutions, something every society periodically requires to clear out what is obsolete, ossified and dysfunctional — and to tilt the playing field of wealth and power away from the old and back to the young.

The funds periodically require investors to add more money, and late last year, Goldman's most senior management and board began to realize some employees might have trouble living up to this obligation after receiving low bonuses, according to a person briefed on the situation.

Solar power is a valuable source of power for wireless sensor networks, but it periodically requires an appropriate energy management strategy.