4周搞定2000+托福核心词
subjective = sub(下面) + ject(扔) + ive(...的) = 自己扔下去的→主观的
subject = sub(下面) + ject(扔) = 扔下去让大家讨论→主题，话题
strata = strata(扩散) = 层层扩散→层
stratify = strat(扩散) + ify(…化) = 扩散成层→层化
在下面扩散→基质，底层
substrate
常考释义
In contrast to other productivity in the ocean, which is confined to various species of algae and bacteria dependent on nutrient concentrations in the water column, seagrasses are rooted plants that absorb nutrients from the sediment or substrate.
海洋中其他物种的产出率受到各种藻类和细菌的限制，而藻类和细菌又依赖于水体营养物质的浓度，但海草与其不同，海草是根系植物，可以从沉积物或海洋基底当中吸收养分。
来源于：阅读OFFICIAL44 P3n. 【生物化学】基质；被酶作用物
Silk scaffolds are used as a cell substrate in tissue engineering, providing a three-dimensional environment in which cells can grow.
丝类支架可以被用作组织工程学领域的细胞基质，它能提供细胞生长所需的立体环境。
In contrast to other productivity in the ocean, which is confined to various species of algae and bacteria dependent on nutrient concentrations in the water column, seagrasses are rooted plants that absorb nutrients from the sediment or substrate.
海洋中其他物种的产出率受到各种藻类和细菌的限制，而藻类和细菌又依赖于水体营养物质的浓度，但海草与其不同，海草是根系植物，可以从沉积物或海洋基底当中吸收养分。
来源于：阅读OFFICIAL44 P3In the case of animals it is usually food; in the case of forest plants it may be light; in the case of substrate inhabitants it may be space,as in many shallow-water bottom-dwelling marine organisms.
这种资源对动物而言常是食物，对森林植物而言可能是阳光，对地面物种来说可能是空间，比如很多生活在浅海海床上生物。
来源于：阅读OFFICIAL29 P2Once established, a stand of Spartina begins to trap sediment, changing the substrate elevation, and eventually the stand evolves into a high marsh system where Spartina is gradually displaced by higher-elevation, brackish-water species.
一旦落地生根，米草属植物就开始截留沉积物，改变基质的海拔高度，最终这片米草属植物会逐渐被更高海拔的微咸淡水植物所取代，发展成了一个高海拔的沼泽系统。
来源于：阅读OFFICIAL22 P1n. （电子）衬底，基底，基片
Conventional transistors use a metal electrode, called the gate, to control the flow of electrons through a planar channel in the silicon substrate.
传统晶体管使用一个叫做“栅极”的金属电极，以控制电子在平面硅基片上的沟道中的流动。
n. 【印刷】底面
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