Cách sử dụng
The word 'cog' is often used in the context of machines and mechanics. A cog is a small toothed wheel that is used to transmit power or motion from one part of a machine to another. An example of this is the gears in a bicycle, where the cog is the wheel with teeth that the chain connects to when you pedal. Cogs are also used in many other mechanical devices such as clocks, engines, and conveyor belts. So, if you hear someone talking about a cog, they are likely referring to a small component of a machine that helps it function properly.