a careful and systematic study of a subject to discover new facts or information about it
one of the owners of a business or company who shares the expenses, profits, and losses
to establish the main office or administrative center of an organization or company in a particular location
a person, organization, company, etc. that pays to get things from businesses or stores
a device that does what is was made to do by controlling and directing a small electric current
a camera that captures an image as digital data that can be kept and viewed on a computer
a hand-held electronic device that is used for reading e-books and other documents in digital format
a piece of furniture designed to hold electronic instruments like radios or televisions
a device that uses GPS technology and satellite signals to help drivers navigate to their destination by providing them with real-time information about their location and route
a portable device that combines the functions of a cell phone and a computer, such as browsing the internet, using apps, making calls, etc.
any movie, picture, note, etc. designed to promote products or services to the public
广告,宣传
an electronic device with a screen that receives television signals, on which we can watch programs