倾斜面的英文：
rake face
declivity
inclined plane
sloping portion
slant plane

参考例句：

Taper Faces
倾斜面

A downward incline or passage; a slope.
向下的斜面;倾斜面

Look at that cliff. The layered rocks making up the cliff seem to be displaced along an inclined plane.
快看那座悬崖，组成悬崖的层状暑石似乎沿著一个倾斜面发生了错开位移。

rake是什么意思：
n. 耙子；耙状工具
v. 耙；梳理

a rabble; a rake
耙子

The gardener rakes up the beds (the walks) (with a rake).
这园丁(用耙)耙平花坛(路径)。

rake the sky with a searchlight
用探照灯扫视天空

face是什么意思：
n. 脸，面孔；外表，外貌；钟面；表盘
v. 面对，面向…；必须对付…

His face was a decadent face.
他的脸是一张颓废派艺术家的脸。

Face the music.
不得不接受惩罚、承担后果,必须承受出现的局面。

Eventually, he came face to face with discrimination again.
最后，他再次直面歧视。

declivity是什么意思：
n. 斜坡

He had rolled down a declivity of twelve or fifteen feet
他是从十二尺或十五尺高的地方滚下来的。

well, to take away this discouragement, I resolv'd to dig into the surface of the earth, and so make a declivity.
为此,我决定把地面掘起,掘出一个向下的斜坡。

It seemed to him that he had but just waked up from some inexplicable dream, and that he found himself slipping down a declivity in the middle of the night, erect, shivering, holding back all in vain, on the very brink of the abyss.
他仿佛觉得他刚从一场莫名其妙的梦里醒过来，又看见自己正在黑夜之中，从一个斜坡滑向一道绝壁的最边上;他站着发抖，处于一种进退两难的地位。