Dictionary entry
one-third
noun
三分之一
one of three equal parts of a divisible whole
- 1.
one of three equal parts of a divisible whole
In use
One-third of the students passed the exam.
The recipe calls for one-third of a cup of sugar.
He only finished one-third of his homework.
one-third of [noun phrase]
表示整体的一部分,后接名词短语。
one-third of the cake
蛋糕的三分之一
by one-third
与动词搭配,表示变化的幅度。
the price increased by one-third
价格增加了三分之一
[determiner] one-third [noun]
用作定语修饰名词,常见于分数表达。
a one-third discount
三分之一折扣
Common mistakes
He ate one third of the pie.He ate one-third of the pie.
在英语中,当“one-third”作为名词使用时,通常需要用连字符连接“one”和“third”,表示一个整体单位。缺少连字符可能导致阅读歧义,尽管在非正式场合可能被接受,但标准书面英语中应使用连字符。
The recipe calls for one-thirds of a cup.The recipe calls for one-third of a cup.
“one-third”本身已是单数形式,表示“三分之一”。在英语中,分数中的分子为1时,分母始终使用单数形式,因此不能加-s变为“one-thirds”。正确的表达是“one-third”,复数形式仅用于分子大于1时,如“two-thirds”。
Connections
Confusing words
- two-thirds
- 三分之二 · 分母相同但分子不同;one-third是三分之一,two-thirds是三分之二,数量不同。
- one-half
- 一半 · 分母不同;one-third是三分之一,one-half是二分之一,大小不同。
- one-thirty
- 一点三十分 · 发音近但意思不同;one-third是分数三分之一,one-thirty是时间一点半。
Word family
- two-thirds
- 三分之二 · two + third + -s
- thirdly
- 第三;第三点 · third + -ly
- thirds
- 三等份 · third + -s
Learner notes
Grammar Note
分数作名词时通常可数,如 one-third、two-thirds。
Dictionary facts from ECDICT, WORDNET.