3D printer – n. a device that can manufacture objects in a way similar to how copies of documents are made

valve – n. a mechanical device that controls the flow of liquids

app (application)– n. a computer program

virtual reality – n. pictures and sounds created by a computer that are aimed at affecting a person's experiences and senses

translate – v. to change words from one language to another

cough – n. to force air through the throat making short loud noises, often because a person is sick

signature – n. signs that show a specific thing is present

contact tracing – n. to watch and record who a person has contact to discover the spread of disease