Các câu ví dụ cho từ demonstration

1.   This is a talk with a digital presentation and a practical demonstration on the use of various lighting sources to create interesting effects.

2. Practical lighting demonstration 4:30 p.

3. Police said several hundred far-right and far-left extremists had infiltrated a demonstration by some 5,000 calmer "yellow vest" protesters who had gathered in the capital to denounce President Emmanuel Macron’s fuel tax increases.