This way, I implicitly defined the outside of the cube as the front face and the inside as the back face.

通过这样的方式，也就隐式地将立方体的外部定义为正面，而将内部作为背面。

youdao

The annular magnet is embedded into an inner cavity of the rubber ring, the plastic cover disk is covered at the back face of the rubber ring.

将环形磁铁嵌入橡胶圈的内腔中，再将塑料罩盘盖在橡胶圈的背面。

youdao

The corrosion protection layer arranged on the surface of the back face aluminium plate enhances the corrosion protection effect of the utility model, thereby prolonging the service life.

背面铝 板表面设置有防腐层，增强其防腐效果，延长使用寿命。

youdao

The expression probably comes from the physical act of turning your back toward someone, instead of speaking to him face-to-face.

VOA: special.2009.12.13

And the head you are seeing at the back there he was trying to touch is his wife's face.

他用手于去触摸的那个人,是他的妻子。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

the face being drawn back in a universal expression that every human everywhere would be able to recognize.

用一种普遍的面部表情，脸被后拉,任何地点，任何人都能辨认。

耶鲁公开课 - 心理学导论课程节选

Durant suffered several serious injuries, including a broken back and face and leg wounds.

CNN: Videos of POWs a staple of war propaganda

He added the most serious injury was to a female member of staff who was punched in the back and face.

BBC: Morton Hall Immigration Centre

His family in the UK have called on the British government to bring him back to face a trial under the UK judicial system.

BBC: Ex-soldier Danny Fitzsimons awaits Iraq murder verdict