Element
01
元素, 成分
a substance that is composed of only one type of atom, typically characterized by specific physical and chemical properties
例子
Gold is a precious metal and chemical element with the symbol Au.
黄金是一种贵金属和化学元素，符号为Au。
02
an abstract component or essential part of something
例子
The periodic table lists all known chemical elements.
03
a physical part of a whole, especially one that can be separated, replaced, or attached within a system
04
the natural conditions or environment most suitable for a plant or animal
05
a straight line that forms part of the surface of a cylinder or cone
06
the state or situation in which someone feels most natural, effective, or at ease
07
one of the four basic substances—earth, water, air, fire—believed in ancient and medieval thought to make up the physical world
