(noun.) having the function of uniting a group of similar things; 'the Democratic Party is an umbrella for many liberal groups'; 'under the umbrella of capitalism'.
(noun.) a formation of military planes maintained over ground operations or targets; 'an air umbrella over England'.
(noun.) a lightweight handheld collapsible canopy.
(adj.) covering or applying simultaneously to a number of similar items or elements or groups; 'an umbrella organization'; 'umbrella insurance coverage' .
珍手打
校对:拉里