divide 与separate

separate:
To set or keep apart; disunite.
分隔：设置或保持隔开；使隔开
To space apart; scatter:
分散：把…分隔开；使分散：
small farms that were separated one from another by miles of open land.
小农场零星地分散在开阔的土地上
To sort:
分类：
separate mail by postal zones.
根据邮政地区分拣邮件
To differentiate or discriminate between; distinguish:
区分：在…之间区分或辨别；识别：
a researcher who separated the various ethnic components of the population sample.
区分人口样本中各种少数民族成份的研究人员
To remove from a mixture or combination; isolate.
离析：从混合物或结合体中分离；使脱离
To part (a couple), often by decree:
分离，脱离：使（一对夫妇）分离，通常通过法令：
She was separated from her husband last year.
去年她和丈夫离婚了
To terminate a contractual relationship, as military service, with; discharge.
解除：与…终止契约关系，如军队服役；解除
v.intr.（不及物动词）

divide:
To separate into parts, sections, groups, or branches.See Synonyms at separate
分割，分离：分成几部分、几块、几组或几个分枝参见 separate
To sector into units of measurement; graduate.
刻尺度：将计量单位标以刻度；划分度数
To separate and group according to kind; classify.
分类：把…按种类分类或分组；分类
To separate into opposing factions; disunite:
使分成对立的派别；使分裂：
“They want not to divide either the Revolution or the Church but to be an integral part of both”(Conor Cruise O'Brien)
“他们既不想分裂革命党也不想分裂教会派，而是想集二者之成”(康纳·克鲁斯·奥布赖恩)
To cause (members of a parliament) to vote by separating into groups, as pro and con.
表决：使（国会成员）分成赞成与反对的两组进行投票
To separate from something else; cut off:
分开：把…跟别的东西分开；分离：
divided the boys from the girls for gym class.
上体育课时把男孩跟女孩分开
To apportion among a number.See Synonyms at distribute
数字分配参见 distribute
Mathematics
【数学】
To subject to the process of division.
除法：依除法的过程而定
To be an exact divisor of.
以…来除：成为…的精确除数
v.intr.（不及物动词）

part:
Any of several equal portions or fractions that can constitute a whole or into which a whole can be divided:
等分：可组成一个整体或可被分割的整体的几等分或几部分之一：

The line where the hair on the head is parted.
分缝，分发线：头发分开处的一条缝

divide 用于divide into 意思是把一个整体分成若干份.
separate 用于separate from 是把由个体组成的群体分成若干份.