One essential aid to understanding the human genome is to sequence the surprisingly similar genome of the mouse.

William considered it unfair of his mother not to allow him to take that equally essential aid to travel, his bicycle.

It deals with all historical periods from the medieval to Victorian, and is an essential aid to the study of vernacular buildings.

France desperately needed soldiers, and looked to Scotland, her old ally, to provide essential military aid.

Japan can pledge essential aid and investment to be delivered once North Korea allows inspections.

She did what she could to administer essential first aid.

The officials have insisted that what remained for quick Congressional review was essential military aid to bolster the Saudis' immediate defenses.

Mr President, clean and safe bathing water is an obvious necessity, and an essential aid to a prosperous tourist industry.

This means that you cannot blame Israel for maintaining an economic blockade, allowing in only essential humanitarian aid.

Population growth should not, therefore, be used as an excuse for refusing essential aid and trade preferences.