(noun.) a show of military force or preparedness; 'he confused the enemy with feints and demonstrations'.
(noun.) a public display of group feelings (usually of a political nature); 'there were violent demonstrations against the war'.
(noun.) proof by a process of argument or a series of proposition proving an asserted conclusion.
(noun.) a visual presentation showing how something works; 'the lecture was accompanied by dramatic demonstrations'; 'the lecturer shot off a pistol as a demonstration of the startle response'.
埃米莉录入
整理:莱斯利