该系统是根据即便在缺乏地质调查设施的国家也能容易获取的因素设计的，这包括基岩地质、山坡坡度和植被类型。

The system is based on factors that are easily available even in countries with poor facilities, such as bedrock geology, slope gradient and vegetation type.

youdao

因此工程师们添加了例如小坡度后盖、平整的底板以及能控制气流的小型的褶皱和鳍翼之类的细节设计。

So engineers added details such as a gently sloping rear hatch, a flat bottom and small creases and fins that manage airflow.

youdao

这些墙壁的建造最初是为了阻止超过30%的自然坡度，这也是它们被纳入正式的结构设计的一部分的原因。

These walls were originally raised to stop the gradient of over 30% of the natural slope, which is why they are included as part of the formal and structural design.

youdao