The hard shell course on soft clay foundation has such characters as stress distribution, back berm, lagging behind of settlement and closedaction.
天然双层软土地基上的硬壳层具有应力扩散、反压护道、沉降滞后和封闭作用等特征。
2
Moreover, an element that has no content is represented by an empty child list, but a self-closed tag is represented by None. Listing 2 shows this structure in action.
而一个没有内容的元素由一个空的子列表表示，但是一个自封闭的标记由None表示。
3
Negative feedback loop — a closed path of action and reaction that self-limiting rather than self-reinforcing.