fraction sth into sth
into 后面引出分出来的各个部分；要说明分离方法时可用 by。
The plant fractions crude oil into several useful products.
这家工厂把原油分馏成几种有用的产品。
把……分成几部分；分割
fractioned — past of fraction
分馏；分成若干部分或分数；进行分馏；小部分；破片
分成若干部分或分数
To divide or break into fractions.
进行分馏
To fractionate.
一般现在时
The machine fractions the mixture into its components.
这台机器将混合物分离成各个组分。
一般过去时
They fractioned the solution by heating it.
他们通过加热将溶液分级分离。
现在完成时
We have fractioned the data into smaller sets.
我们已将数据分成较小的集合。
规则动词：fraction 的过去式和过去分词均加 -ed。
The lab technician will fraction the mixture into several samples.
实验室技术员将把混合物分成几份样品。
用法提示：fraction 作动词，表示“分成几部分”。
They fractioned the solution to separate its components.
他们对溶液进行分馏以分离其成分。
用法提示：fractioned 是 fraction 的过去式，表示“分馏”。
The program fractions the data into smaller sets for analysis.
该程序将数据分成较小的集合以供分析。
用法提示：fractions 是 fraction 的第三人称单数形式，表示“分割”。
into 后面引出分出来的各个部分；要说明分离方法时可用 by。
The plant fractions crude oil into several useful products.
这家工厂把原油分馏成几种有用的产品。
只说出被分的整体、不点明分出的部分时，可以不加 into 短语。
Laboratories fraction the sample before testing it.
实验室先把样本分成若干部分，然后再进行检测。
grammar · medium
易错句子The refinery fractioned the crude oil to several parts.
正确表达The refinery fractioned the crude oil into several parts.
fraction 表示“把……分成若干部分”时，后面用 into 引出分成的结果或份数，不能用 to；to 只表示方向或终点，不表示“分成几份”，所以此处必须用 into。
grammar · medium
易错句子The fraction of the mixture took two hours.
正确表达The fractioning of the mixture took two hours.
这里要表示“分馏、分割”这个动作，应该用动词 fraction 的动名词形式 fractioning 作主语；fraction 作名词指“一小部分、分数”，用它会让句子变成“混合物的一小部分花了两个小时”，意思完全变了。
grammar · medium
易错句子The crude oil was fraction in the tower.
正确表达The crude oil was fractioned in the tower.
被动语态由 be + 过去分词构成，fraction 的过去分词是 fractioned；be 后面直接跟动词原形属于中文思维下漏加 -ed 的常见错误，必须补上过去分词。
把混合物分馏（分成若干组分）
The chemist fractioned the mixture to separate its components.
这位化学家把混合物分馏，以分离其中的各种成分。
把样品分成若干份
Technicians fractioned the sample into smaller portions for testing.
技术人员把样品分成较小的若干份进行检测。
分馏原油
Refineries fraction crude oil to produce different fuels.
炼油厂对原油进行分馏，以生产不同种类的燃料。
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