有四个等边三角形面的四面体。

A tetrahedron with four equilateral triangular faces.

youdao

她说：“它真可以说是四面的白墙，而你有10平方英尺的房间来布置，由自己来装点”。

"It is literally four white walls and you have a 10 by 10 square foot room to work with, to make your own," she says.

youdao

四面三角体模块是有四 个平面的立体模块；

The tetrahedron triangle module is a solid module with four planes;

youdao

四面三角体模块是有四 个平面的立体模块；

The tetrahedron triangle module is a solid module with four planes;

youdao