demonstration
/ˌdemənsˈtreɪʃən/noun
1
- mass noun the showing of something's existence or truth by giving proof or evidence证明, 证实：
it is not capable of mathematical demonstration
这无法用数学方法证明
count noun his demonstration that feature films could be both art and social treatise.他关于故事片可同时是对艺术和社会问题的探讨的证明。
1.1
- the outward showing of feeling感情流露（或表达）：
count noun physical demonstrations of affection.爱意的肢体表达。
1.2
- count noun a practical exhibition and explanation of how something works or is performed示范, 演示：
a microwave cookery demonstration.
微波炉烹调演示。
2
- a public meeting or march protesting against something or expressing views on a political issue示威集会, 示威游行。
词源
late Middle English （also in the senses 'proof provided by logic' and 'sign， indication'）： from Latin demonstratio（n-）, from demonstrare 'point out' （see DEMONSTRATE）. Sense 2 dates from the mid 19th cent.