level
单词辨析：
指平坦没有倾斜的；也指两事物齐平的，常后接介词 with。
The floor is quite level.
这地板很平。
The city was built on a level terrain.
该市建于平坦之地。
Your eyes should be level with the top of the picture.
眼睛应该与画的上端齐平。
指表面平整无凸起的。
Try to make the top of the hedge even.
尽量把篱笆顶部弄平整。
The road is not even.
这条路不平坦。
指表面平滑的，无凹凸、倾斜或弯曲之处，但不一定是水平的。
The earth is round but not flat.
地球是圆的，而不是扁平的。
Work on a clean, flat surface.
在干净、平整的桌面上工作。
指与地平线平行的。
a horizontal instrument/surface
水平仪/面
The vertical line meets the horizontal one here.
垂直线与水平线在此相交。
普通用词，指物体变平或使物体变平；也指通过撞击、轰炸等将建筑物、树木等夷平。
Why do biscuits flatten slightly while cooking?
为什么饼干在烤的时候会略微变平呢？
You'd better use the rolling pin to flatten the dough.
你最好用擀面杖把面团擀平。
The enemy bombers have flattened the city.
敌人的轰炸机把这座城市夷为平地。
只作及物动词，指将某物弄平整，或摧毁、夷平建筑物等，常可与 flatten 换用。
The workers managed to level/flatten the floor.
工人们设法把地面弄平整了。
Bombs levelled/flattened half of the city.
炸弹把一半城市夷为平地。
指用手把纸、布等弄平整。
He smoothed out the paper and then began to write on it.
他先把纸抹平，然后开始在上面写字。
She helped her son to smooth out all the wrinkles.
她帮儿子把所有的褶皱弄平整。
相关例句：
If you don't know your cholesterol level, it's a good idea to have it checked
你要是不清楚自己的胆固醇水平，最好去检查一下。
The floor was level, but the ceiling sloped toward his head.
地板是平的，但天花板朝他的头这边倾斜。
We do have the lowest level of inflation for some years
我们的通货膨胀率多年来确实一直保持在最低水平。
Napoli have drawn level with AC Milan at the top of the Italian league.
那不勒斯队追平了AC米兰队，并列意大利联赛排行榜的榜首。
Michael's roommate had been pleasant on a superficial level
迈克尔的室友表面上还算友善。
Stir in 1 level teaspoon of yeast.
加入一平茶匙的酵母后搅拌。