element

名词 element:

an abstract part of something

同义词：component, constituent, factor, ingredient

any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

同义词：chemical element

an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system

同义词：component, constituent

one of four substances thought in ancient and medieval cosmology to constitute the physical universe

the most favorable environment for a plant or animal

the situation in which you are happiest and most effective

a straight line that generates a cylinder or cone