simplicia

三角形或四面体向任意维度的推广；更准确地说,是n维空间中n+1个仿射无关点的凸包。

A generalization of a triangle or tetrahedron to an arbitrary dimension; more accurately, the convex hull of n+1 affinely independent points in n-dimensional space.

非复合词,且不含派生词缀的词(屈折词缀通常忽略不计)；即单语素词。

A word which is not compound and contains no derivational affixes (inflectional affixes are usually disregarded); a monomorphemic word.

只有一层楼的公寓(或有时是其他类型的房产)；单层房产。

An apartment (or, sometimes, another type of property) having only one floor or storey; a single-storey property.