化学
Erode--Erosion
Rot
Decay
Decomposition
Rust
Limestone石灰石
Silicon硅
Crystal
Copper
Lead铅
Mercury水银
Nickle 镍
Sodium钠
Calcium钙
Oxygen氧气
Nitrogen氮
Gasoline
Petroleum
Hydrocarbon
Plastic
Molecule
Particle
Solution—solubility
Dissolve
Blend
Compound