atomic nucleus / (algebra) kernel / (astronomy) core, nucleus / cell nucleus

phase diagram

(physics) liquid phase

use (noun) / a task, business, an errand

a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

mixture

建材: building material / 健在: (a person in) good health; no decline in condition / 顕在: tangibility, clear existence

健在: in good health; showing no decline

顕在: be apparent, clearly exist

diagram, figure, illustration