单词substratum
n.: （尤指岩石或土壤的）下卧层；底土层
网络: 下层；底层；基质
（尤指岩石或土壤的）下卧层；底土层:
a layer of sth, especially rock or soil, that is below another layer
胶层感光乳剂附着的
下层;基础;【生物学】(生态学中的)基层;根本
【生物化学】培养基;基质;【农业】下层土;底土,心土;【摄影】(胶片片基与乳剂间的)胶层
底质
酶作用物
底物
根据
〔美国〕下层社会
底土层
附着层
底层;下层土
复数：substrata
There is no human nature in the sense of a biologically fixed substratum determining the variability of socio-cultural formations.
如果说，生物性的固定基础可决定各种多样的社会文化组成，那麽人之天性也就不存在了。
epipsammon Organisms living on the surface of a sandy substratum or on the surface of the sand particles.
沙面生物生活在沙下层土壤的表面上的生物或在沙粒的表面上。
Potential of an ancient village field consists of two parts, i. e. the potential of settlement field and potential of substratum field.
场可以用物理量“势”来计算，古村落场的势由聚落场的势和基质场的势构成。
Seasonal reproduction of marine sessile organisms may be an adaptation of seasonal variation in suitable substratum availability.
中文摘要海洋生物年周期性的生殖行为可能是为了天然底质年周期性变动的一个适应结果。
Its syntax, many grammatical features, a number of phrases and the style of a typical sentence do betray an important Slavic substratum.
它的句法，许多语法特点，一些短语和典型句子的风格确实透露了重要的斯拉夫语基础。
They come at least in pairs, one serving as substratum for the other.
他们至少都是成双成对，互为对方的次阶层。
The substratum"s colour is still purple for no acid producing in bacillus depressant section.
细菌被抑制的区域，无酸产生，培养基仍为紫色。
The best nutrition supply was basic substratum mixed with rapeseed cake liquid.
营养供给以基本基质加菜籽饼水液为佳。
It may be brunk solely of drunk with other beverage. It can be used as the best substratum of spirit.
伏特加是一种纯净酒，它可以单独饮用或者混合饮用，也可以作为各类饮料酒的最好酒基。
They proliferate and migrate randomly on the substratum and then align and finally form multinucleated myotubes.
他们增殖和迁移的基质上，然后随机调整，最终形成多核肌管。