英语释义
1
n someone who supervises (an examination)
2
n someone who gives a warning so that a mistake can be avoided
3
n an ironclad vessel built by Federal forces to do battle with the Merrimac
4
n display produced by a device that takes signals and displays them on a television screen or a computer monitor
5
n electronic equipment that is used to check the quality or content of electronic transmissions
6
n a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble
7
n any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
8
v keep tabs on; keep an eye on; keep under surveillance
9
v check, track, or observe by means of a receiver