詞根 strat = 層
1.stratum [strat 層,-um 名詞后綴]
n.地層,階層
2.stratiform [strat 層,-i-,-form 有...形狀]
adj.層狀的
3.stratification [strat 層,-i-,-fication 名詞后綴]
n.分層
4.stratify [strat 層,-i-,-fy 使成... , 作成...]
v.使成層,使分層;成層,分層
5.stratus [strat 層,-us 名詞后綴]
n. 層云
6.superstratum [
n.上層,覆蓋層
7.substratum [sub- 下,stratum 層]
n.下層,基礎(chǔ)