vt.

1. 论证，证明[+（that）]
   The lawyer demonstrated that the witness was lying.

   律师证明证人在说谎。

2. （用实验，实例等）说明，教[+wh-]
   The doctor demonstrated the harmful effects of tobacco.

   医生用实例说明烟草的有害副作用。

3. 示范操作（产品），展示
   The salesperson demonstrated a new washing machine.

   推销员当众演示新式洗衣机的优点。

4. 显示，表露
   This fully demonstrates their willingness to cooperate.

   这充分表明他们愿意合作。

vi.

1. 示威，举行游行示威[（+against）]
   The workers demonstrated for higher wages.

   工人示威要求加薪。

v.

1. clearly show the existence or truth of.
   ▸give a practical exhibition and explanation of.
2. take part in a public demonstration.