1
bisect sth
The new highway will bisect the quiet village.
新公路将把这个安静的村庄分成两半。
把…分成两半；对分；平分
先理解核心含义，再看它在真实句子里的用法。
把…分成两半；对分；平分
cut in half or cut in two
The new highway will bisect the quiet village.
新公路将把这个安静的村庄分成两半。
切成或分成两部分。
To cut or divide into two parts.
bisect
Base
原形
bisects
3rd person
第三人称单数
bisecting
-ing
现在分词
bisected
Past
过去式
bisected
Past participle
过去分词
The river bisects the valley.
这条河把山谷分成两半。
We bisected the pie to share it.
我们把馅饼分成两半来分享。
The new highway is bisecting the farmland.
新公路正在把农田一分为二。
bisect 是规则动词，意为“分成两半/对分”，常用于几何或切割场景。
A narrow river bisects the old town.
一条狭窄的河流把老城分成两半。
We bisected the cake and each of us took half.
我们把蛋糕对半切开，然后我们每人拿了一半。
The builders are bisecting the plot with a new wall.
建筑工人正在用一堵新墙把这块地一分为二。
The new highway will bisect the quiet village.
新公路将把这个安静的村庄分成两半。
常用被动语态，强调由某物把整体分成两部分。
The field is bisected by a narrow stream.
这块田地被一条狭窄的小溪分成两半。
Not this
The teacher bisected the frog in biology class.
Use this
The teacher dissected the frog in biology class.
“bisect” 表示把物体平分成两半，而 “dissect” 才表示“解剖、仔细切开”以进行研究。此处宾语是青蛙，意在解剖，故须用 dissect。
Not this
The line bisects.
Use this
The line bisects the angle.
“bisect” 是及物动词，后面必须接被平分的对象；不能单独使用。补上宾语 “the angle” 后意思才完整。
Not this
The two roads bisect at the square.
Use this
The two roads intersect at the square.
“bisect” 指“把某物分成两半”，而两条路交叉相会应用 “intersect”。此句表达两条路在广场相交，故须改用 intersect。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
平分一个角
Use a compass to bisect the angle.
用圆规把这个角平分。
把一条线段二等分
The teacher showed us how to bisect a line segment with a ruler and compass.
老师向我们展示了如何用直尺和圆规把一条线段二等分。
河流把城市分成两半
The river bisects the city into northern and southern halves.
这条河把城市分成南北两半。
被……分成两半
The field is bisected by a narrow road.
这块田地被一条窄路分成两半。
把圆分成两半
A diameter bisects the circle.
直径把圆分成两半。
Use bisect naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
bi-表示“两”，sect像section（切）→一刀切成两半，即对分。
语域：formal 常见场景：geometry、formal writing 该词通常较正式，多见于几何等专业领域或正式书面语；日常口语中更常说 cut in half。
常用于数学或正式文体，表示将某物分成相等的两半。
Dictionary facts from ECDICT, WIKTIONARY.