관찰

To disappear or cease to exist, often used for languages, species, or legal rights.

To break down a whole into its parts, or to decompose chemically.

To select or sort out specific things from a group based on certain criteria.

A physical representation or a theoretical structure used as a pattern for something to be made or to explain how something works. It is often a simplified version of a complex system.

Power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines. A major topic in IELTS Environment and Technology sections.

The space between two objects or points, or the period of time between two events.

To develop gradually, especially from a simple to a more complex form. In IELTS, this applies to biology, technology, and social systems.

The ability of an organism, organization, or system to survive, grow, or sustain itself independently without external help.

To combine or integrate different fields, ideas, or techniques to create a synergy. Originally it refers to grafting in gardening.

The act of putting things in a specific order or position; the resulting state of such an arrangement.