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以下是引用linnasun在2003-11-16 0:08:00的发言：
difficulty 因该是单复数形式均有吧？ 使用起来有什么区别呢？
都有，全给贴出来：
1
[uncountable]if you have difficulty doing something, it is difficult for you to do
have/experience difficulty (in) doing something
They had great difficulty in finding a replacement.
with/without difficulty
He got to his feet with difficulty.
2
[countable usually plural] a problem or something that causes trouble
difficulty with
There are several difficulties with this theory.
If you have any difficulties , give me a call.
The project soon ran into difficulties .
Difficulties can arise when there is more than one defendant.
We're confident that the legal difficulties can be overcome .
The rearrangement of school classes may cause timetabling difficulties .
Their ten years of marriage have been fraught with difficulties .
the practical difficulties of prosecuting alleged war criminals
The broadcast was delayed because of technical difficulties .
She developed breathing difficulties during the night.
3
[uncountable]if you are in difficulty, you are in a situation in which you have problems
in difficulty
The business is in financial difficulty.
get/run into difficulty (=get into a difficult situation) She soon got into difficulty with debt.
4
[uncountable] the quality of being difficult to do
the difficulty of (doing) something
the difficulty of solving such problems
5
[uncountable] how difficult something is
The tests vary in difficulty. | 
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发表于 2003-11-15 01:03:00
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