季节湖    seasonal lake?

季节性迁移    seasonal migration?

季节周期    seasonal periodicity?

季节变异    seasonal variation?

季节性代替种    seasonal vicariad?

季节性冻土    seasonally frozen ground?

海藻    seaweeds?

割线    secant?

透萌板    secchi disc?

闭塞    seclusion?

次生碱度    secondary alkalinity?

次生异常    secondary anomaly?

次生粘土    secondary clay?

次生群落    secondary community?

次生结核    secondary concretion?

副气旋    secondary cyclone?

次生矿床    secondary deposit?

副低压    secondary depression?

次生分散晕    secondary dispersion halos?

二次富集带    secondary enrichment zone?

次生富集    secondary enrichment?

次生环境    secondary environment?

小褶曲    secondary fold?

次生林    secondary forest?

次生地球化学异常    secondary geochemical anomaly?

次生矿物    secondary minerals?

次生矿    secondary ore?

副虹    secondary rainbow?

二次标淮    secondary standard?

次生构造    secondary structure?

次生演替    secondary succession?

次波    secondary wave?

分泌    secretion?

分泌神经    secretory nerve?

部分    section?

分区图    sectorized picture?

久期平衡    secular equilibrium?

长期地壳运动    secular movements of the earth‘s crust?

缓慢沉陷    secular subsidence?

缓慢隆起    secular upheaval?

长期变化    secular variation?

苔草禾本云杉林    sedge grass spruce forest?