Mr Chivers overlays a street map with colours representing the different substrata - " half eccentric artwork, half primary-school science project" - which becomes a springboard for his digressions.

奇弗斯先生用代表底层结构的色，描绘出一张街道地图——“既像古怪的艺术品，又像小学的科学项目”——成了他离题的跳板。

You can have the solution moistening a substratum of rock wool at the bottom of the container.

你可以用溶滋润容器底部的岩棉基质。

Alternatively, the plants can grow with their roots in a substratum such as sand, vermiculite, or LECA granules.

除此之外，植物也可以在土壤中生长，如沙子、蛭石或莱卡颗粒。

In this there was a substratum of truth.

有一个真理的基础。

While he did not answer she began to feel the old hypnotism of his intelligence, sometimes exercised without power but always with substrata of truth under truth which she could not break or even crack.

虽然他没有回答，但她开始感受到他智慧的古老催眠术，有时没有力量，但总是在真理之下隐藏着真理的底层，她无法打破甚至破解。

There's another substrata, if you really want to get into the Bible, study carefully on it.

还有一个层，如果你想深入研究《圣经》，仔细研究它。