看来,要去先买本书。
Another book to travel in Europe with budget:
[ame="http://www.amazon.com/Lets-Go-Europe-2010-Student/dp/1598803131"]Amazon.com: Let's Go Europe 2010: The Student Travel Guide (9781598803136): Inc. Harvard Student Agencies: Books[/ame]
From Paris airport, train (similar to subway) can take you to Paris downtown area where you can switch to taxi. Purchase subway (metro) tickets in 10 or for N days may save you some money.
Subway (metro) is the best way to travel in Paris.