Sentence examples similar to several weeks are needed from inspiring English sources

The double peak is followed at continental stations (Retalis and Retalis 1997; Harrison and Aplin 2002) and is generally synchronized with local time and the intensity of local effects (Chalmers 1967), while the GEC signal is not always apparent and averaging over one or several weeks is needed to be shown (Dolezalek 1972).

A higher level of physical activity appears to be required, that is a higher intensity per training session or even several sessions per week are needed, for achieving health benefits [ 29].

At MICU discharge, a recovery period of several weeks is often needed before chemotherapy can be given.

Density of pile is about 300 knots to the square inch and a weaver completes about 8,000 per day; several weeks' work is needed to produce an ordinary carpet, and possibly months for a more complex one.

Several treatments spaced several weeks apart may be needed to fully remove the keloid.

Donald DiFrancesco (R) delayed the June primary by several weeks, saying it was needed due to the late release of new state legislative maps after redistricting.

In these latter situations, the prolonged administration of aminoglycosides over several days or weeks may be needed.

Several treatments may be needed.

Several layers might be needed.

However, the change is not instantaneous and several weeks of submergence may be needed to increase the pH.

mECT was needed every other week continuously.