名词

1. 大量;丰富;充足
An abundance of something is a large quantity of it.

1. the property of a more than adequate quantity or supply

e.g. an age of abundance

Synonym: copiousnessteemingness

2. (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust
expressed as a percentage or in parts per million

3. (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present