even 通常指平面上的各点或一条直线的各点处在同一平面或直线上。
flat 指光滑平整的表面，但不一定是水平的。
level 强调没有高低之处，且在同一水平面，可引申指才能相等或与相邻某物平行。
smooth 侧重指表面十分平滑，无任何粗糙的感觉。引申作圆滑解。
参考例句
1. I trust no one, not even myself. 我不信任任何人，甚至我自己。
2. I never fear , afraid , and even worry . 我从未畏惧、害怕，甚至是担心。
3. You can even use the same technique to alter photographs. 你甚至可以使用相同的技术来改变照片。
英英解释
n.
1. the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
2. make level or straight
3. become even or more even
4. make even or more even adj.
1. divisible by two
2. equal in degree or extent or amount; or equally matched or balanced
3. being level or straight or regular and without variation as e.g. in shape or texture; or being in th
4. symmetrically arranged
5. occurring at fixed intervals
6. of the score in a contest adv.
1. used as an intensive especially to indicate something unexpected
2. in spite of; notwithstanding
3. to a greater degree or extent; used with comparisons
4. to the full extent
