破折號的用法
　　用于表示句子正常語序中突然或出人意料的中斷。如果意義明確，它也可用于代替括弧或逗號。通常，破折號特別強調它所隔開的部分。
　　破折號常用于對一長項已表達過的內容進行總結。
例 The day was the longest in her life - or so it seemed to her.
Could you - I hate to ask! - help me with these dishes?
When we left town - a day never to be forgotten - they had a record snowfall.
Most of the paintings in the gallery - in fact all but one - were done in the early 19th century.
What he lacked in intelligence - and he lacked a good deal - he made up for in physical strength.
The three of them were seated at one end of a long dining table that could hold - had once often held - eighteen people.
William Harvey did not discover the circulation of the blood in the body. It was discovered - or rather, always assumed - in China.
More than 600 unforgettable - and often surprising - photographs and Illustrations will rivet your attention, no matter what your age.
　　破折號常用來總結一系列已表達過的內容。如：
　　Time and patience - two simple words - yet why are they so hard for me to remember.

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