在学习专业英语词汇中，有时同义词的辨析是很不容易的，我们一般从三方面进行区分，即：语法、语义和文体。语法主要是词性、搭配、句式等的区分;语义主要是词义的本义、引申义、比喻义和内涵和外延等的区分;文体主要是正式和非正式、褒义和贬义等的区分。
1.路
way: Wherever there is room for an object to proceed, there is a way.
road: A road is a prepared way for traveling with horses or vehicles.
path: A way suitable to be traveled only by foot passengers or by animals.
route: A route is a line of travel, and may be over many roads.
street: A street is in some centre of habitation, as a city town or village, when it passes between houses of dwellings.
avenue: A avenue is a long, broad and imposing(庄严) or principal street.
2.时代(期) (时期)
period: It indicates any passage of time, great or small. /an extent of time of any length. (时代)
time(s): It refers to a period in history. in ancient times/ in Victoria time (新时代)
epoch: It indicates a long period of time marked by events or development of a particular kind.
The first flight into space marked a new epoch in the history of mankind. (纪元)
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