adv. 到一半程度；半; 部分地

1.

to the extent of half 到一半程度；半

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The glass was half full .

玻璃杯半满。

The hall was half empty.

大厅有一半是空的。

She is half Italian.

她有一半意大利血统。

2.

partly 部分地

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The chicken was only half cooked.

鸡只煮了半熟。

half-closed eyes

半睁半闭的眼

I was still half asleep.

我还半睡半醒。

I half expected them to follow us.

我还有点以为他们会跟着我们。

I'm half inclined to agree.

我不十分同意。

n. 一半；半; （比赛、音乐会等的）半场，半局; （曲棍球或橄榄球）前卫; （美式足球的）半卫; 半卫的位置; （啤酒等饮料的）半品脱

1.

either of two equal parts into which something is or can be divided 一半；半

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two and a half kilos (= 2½)

两公斤半

One and a half hours are allowed for the exam.

考试时间为一个半小时。

An hour and a half is allowed for the exam.

考试时间为一个半小时。

in the first half of the 20th century

20 世纪上半叶

The second half of the book is more exciting.

书的后半部分比较刺激有趣。

The two halves of the city were reunited in 1990.

1990 年，这座城市的两半重新统一。

the left half of the brain

左脑

the lower half of the window

窗户的下半部

the northern half of the country

该国北半部

I've divided the money in half.

我把钱平均分成了两份。

We'll need to reduce the weight by half.

我们得把重量减轻一半。

2.

either of two periods of time into which a sports game, concert, etc. is divided （比赛、音乐会等的）半场，半局

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No goals were scored in the first half .

上半场没有得分。

She played well in the second half of the match.

她在下半场比赛中发挥出色。

He made two superb saves in the first two minutes of the half.

他在上半场的前两分钟内做出了两次精彩的扑救。

We had a few chances to score in both halves.

上下半场我们都有几次进球机会。

3.

one of the defending players in hockey or rugby whose position is between those who play at the front of a team and those who play at the back （曲棍球或橄榄球）前卫

4.

one of the two attacking players in American football whose position is behind the quarterback and next to the full backs （美式足球的）半卫

5.

the position a half back plays at (also called a tailback in American football) 半卫的位置

6.

half a pint (= 0.568 of a litre in the UK and some other countries, and 0.473 of a litre in the US) of beer or a similar drink （啤酒等饮料的）半品脱

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Two halves of bitter, please.

请来两杯半品脱的苦啤酒。

determiner, pronoun 半数; 绝大部分（时间、乐趣、麻烦等）

1.

an amount equal to half of something/somebody 半数

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I'll see you in half an hour .

半小时后见。

Half (of) the fruit was bad.

水果坏了一半。

Half of the money was mine.

那些钱有一半是我的。

He has a half share in the company.

他拥有该公司的一半股份。

Out of 36 candidates, half passed.

36 名考生中有半数及格。

2.

the largest part of something 绝大部分（时间、乐趣、麻烦等）

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Half the time you don't even listen to what I say.

你大部分时间甚至没听我说的话。

Half the fun of gardening is never knowing exactly what's going to come up.

园艺的最大乐趣是谁也不知道到底会长出什么。