slope
n.斜坡；斜面；斜率
summation
n.总和，和；合计
symmetry
n.对称（性）；匀称(balance, harmony)
The idea of symmetry is wildly used in architecture and designing.
对称的想法广泛应用于建筑和设计中。
approximate
adj.近似的，大约的(roughly)
The approximate number of demonstrators in front of the municipal office building was 900.
市政办公大楼前大约有900个示威者人。
sequence
n. 序列(procession, progressionN)
progression
n.行进；级数
ascending
adj.上升的，向上的
assumption
n.假定
probability
n.概率；可能性
Probability denotes a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences.
概率是用一个数字来表示某个特定事件发生的可能性,表达式为实际发生数量与可能发生数量的比率。
calculation
n.计算；考虑
classification
n.分类，分级
combination
n.组合
In mathematical terms, combination means one or more elements selected from a set without regard to the order of selection.
在数学术语中,组合意味着在不考虑的选择顺序的情况下，从一个集合中选择一个或多个元素。
logarithm
n.对数
complementary
adj.补充的，补足的
The two angles are complementary angles.
两角互补。
square
n.正方形；平方