Câu ví dụ:
Saigon plans more crime-busting surveillance cameras Survey finds 76 pct of Vietnam's security cameras hackable A public security center has been opened in Ho Chi Minh City connecting a series of surveillance cameras to a main hub.
Nghĩa của câu:surveillance
Ý nghĩa
@surveillance /sə:'veiləns/
* danh từ
- sự giám sát
=to be under surveillance+ bị giám sát, bị theo dõi