- s.s.s
- 层: I storey; tier; stratum
- 上层: upper strata; upper levels; ...
- 料层上层: bed top
- 胚胎外胚层上层: periderm
- 上层: upper strata; upper levels; superstratum; hanging side; overstory; superjacent bed◇上层车厢 imperial; 上层结构 super-structure; 上层清液 supernatant liquor; 上层人士 upper circles; 上层社会 upper classes of society; upper-class of society; 上层水域 superjacent waters
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